Question 1. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Olfactory indicators are those whose colour changes in both, acidic as well as basic medium.
Reason (R): They react with acidic and basic solutions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Olfactory indicators are those whose colour changes in both, acidic as well as basic medium.
Reason (R): They react with acidic and basic solutions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
D). Assertion - (A) is false but Reason - R is true.
Question 2. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Active metals react with acids and liberate Hydrogen gas (H2).
Reason (R): This is an example of displacement reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Active metals react with acids and liberate Hydrogen gas (H2).
Reason (R): This is an example of displacement reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true and R is the correct explanation of A.
Question 3.In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Acids contain H+ ions.
Reason (R): H+ ions neutralise acids.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Acids contain H+ ions.
Reason (R): H+ ions neutralise acids.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 4. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): The process of dissolving an acid or a base in water is a highly exothermic reaction.
Reason (R): A large amount of heat is produced in this reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): The process of dissolving an acid or a base in water is a highly exothermic reaction.
Reason (R): A large amount of heat is produced in this reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true but R is the correct explanation of A.
Question 5. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): When copper sulphate solution is heated its colour changes from blue to white.
Reason (R): It is due to release of water molecules and copper sulphate get converted into crystalline salt.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): When copper sulphate solution is heated its colour changes from blue to white.
Reason (R): It is due to release of water molecules and copper sulphate get converted into crystalline salt.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true but R is the correct explanation of A.
Question 6. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): On heating gypsum at 373K, we obtain Plaster of Paris.
Reason (R): When gypsum is heated at 373K it loses water molecules and gets converted into Plaster of Paris.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): On heating gypsum at 373K, we obtain Plaster of Paris.
Reason (R): When gypsum is heated at 373K it loses water molecules and gets converted into Plaster of Paris.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true and R is the correct explanation of A.
Question 7. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Salts of strong acids and weak bases are basic in nature.
Reason (R): pH value of such salt are less than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Salts of strong acids and weak bases are basic in nature.
Reason (R): pH value of such salt are less than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
D). Assertion - (A) is false but Reason - R is true.
Question 8. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A):The survival of aquatic life in such river becomes difficult.
Reason (R): Acid rain makes the pH of the river water lower than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A):The survival of aquatic life in such river becomes difficult.
Reason (R): Acid rain makes the pH of the river water lower than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true and R is the correct explanation of A.
Question 9. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Limestone, chalk and marble react with acids to form salt, carbon dioxide and water.
Reason (R): Limestone, chalk and marble are different forms of calcium carbonate.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Limestone, chalk and marble react with acids to form salt, carbon dioxide and water.
Reason (R): Limestone, chalk and marble are different forms of calcium carbonate.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 10. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): In a neutralisation reaction, acid and base react to form salt.
Reason (R): Acid contains H+ ions and base OH- ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): In a neutralisation reaction, acid and base react to form salt.
Reason (R): Acid contains H+ ions and base OH- ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 11. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Non-metallic oxides are acidic in nature.
Reason (R): Non-metallic oxides react with base to form salt and water just like an acid reacts with a base.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Non-metallic oxides are acidic in nature.
Reason (R): Non-metallic oxides react with base to form salt and water just like an acid reacts with a base.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
Question 12. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): HCl produces hydronium ions (H3O+) and chloride ions (Cl-) in aqueous solution.
Reason (R): In presence of water, base give H+ ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): HCl produces hydronium ions (H3O+) and chloride ions (Cl-) in aqueous solution.
Reason (R): In presence of water, base give H+ ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 13. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): If the pH inside the mouth decreases below 5.5, the decay of tooth enamel begins.
Reason (R): The bacteria present in mouth degrades the sugar and left over food particles and produce acids that remains in the mouth after eating.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): If the pH inside the mouth decreases below 5.5, the decay of tooth enamel begins.
Reason (R): The bacteria present in mouth degrades the sugar and left over food particles and produce acids that remains in the mouth after eating.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true but R is the correct explanation of A.
Question 14. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): H2CO3 is a strong acid.
Reason (R): A strong acid dissociates completely or almost completely in water.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): H2CO3 is a strong acid.
Reason (R): A strong acid dissociates completely or almost completely in water.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
D). Assertion - (A) is false but Reason - R is true.
Question 15. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Salts are the products of an acid-base reaction.
Reason (R): Salt may be acidic or basic.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Salts are the products of an acid-base reaction.
Reason (R): Salt may be acidic or basic.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
B). Both A and R are true but R is not the correct explanation of A.
Question 16. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): When H2SO4 is added in water, the resulting aqueous solution get corrosive.
Reason (R): Hydronium ions are responsible for corrosive action.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): When H2SO4 is added in water, the resulting aqueous solution get corrosive.
Reason (R): Hydronium ions are responsible for corrosive action.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 17. In the questions given below have two statementslabelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): pH of ammonium chloride solution is in acidic range.
Reason (R): Solution of a salt of weak base and strong acid is acidic.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): pH of ammonium chloride solution is in acidic range.
Reason (R): Solution of a salt of weak base and strong acid is acidic.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 18. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Baking soda does not creates acidity in the stomach.
Reason (R): Baking soda is not alkaline.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Baking soda does not creates acidity in the stomach.
Reason (R): Baking soda is not alkaline.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 19. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Plaster of Paris is used by doctors for setting fractured bones.
Reason (R): When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass and provide a strong support.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Plaster of Paris is used by doctors for setting fractured bones.
Reason (R): When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass and provide a strong support.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 20. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Sodium hydroxide reacts with zinc to produce hydrogen gas.
Reason (R): Acids reacts with active metals to produce hydrogen gas.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Sodium hydroxide reacts with zinc to produce hydrogen gas.
Reason (R): Acids reacts with active metals to produce hydrogen gas.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true and R is the correct explanation of A.
Question 21. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Taste of food is sour.
Reason (R): The food material is acidic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Taste of food is sour.
Reason (R): The food material is acidic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both A and R are true and R is the correct explanation of A.
Question 22.In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Bases are bitter and change the colour of the red litmus to blue
Reason (R): pH value of bases are less than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Bases are bitter and change the colour of the red litmus to blue
Reason (R): pH value of bases are less than 7.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
Question 23. In the questions given below have two statementslabelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): A stain of curry on a white cloth becomes reddish-brown when soap.
Reason (R): Curry is basic in nature and soap is acidic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): A stain of curry on a white cloth becomes reddish-brown when soap.
Reason (R): Curry is basic in nature and soap is acidic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A.
Question 24. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): HCl gas does not change the colour of dry blue litmus paper.
Reason (R): HCl gas dissolves in the water present in wet litmus paper to form H+ ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): HCl gas does not change the colour of dry blue litmus paper.
Reason (R): HCl gas dissolves in the water present in wet litmus paper to form H+ ions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 25. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Weak acids have low electrical conductivity.
Reason (R): Strong acids and weak acids have equal concentration of hydrogen ions in their solutions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Weak acids have low electrical conductivity.
Reason (R): Strong acids and weak acids have equal concentration of hydrogen ions in their solutions.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
C). Assertion - A is true but Reason - R is false.
Question 26. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Phenolphthalein is an acid-base indicator.
Reason (R): Phenolphthalein gives different colours in acidic and basic medium.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Phenolphthalein is an acid-base indicator.
Reason (R): Phenolphthalein gives different colours in acidic and basic medium.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 27. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): When a small amount of copper oxide is added in dilute hydrochloric acid the colour of the solution becomes blue-green and the copper oxide dissolves.
Reason (R): The blue-green colour of the solution is due to the formation of copper(II) chloride in the reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): When a small amount of copper oxide is added in dilute hydrochloric acid the colour of the solution becomes blue-green and the copper oxide dissolves.
Reason (R): The blue-green colour of the solution is due to the formation of copper(II) chloride in the reaction.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 28. In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): Calcium hydroxide reacts with carbon dioxide to produce a salt and water.
Reason (R): Non-metallic oxides are basic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): Calcium hydroxide reacts with carbon dioxide to produce a salt and water.
Reason (R): Non-metallic oxides are basic in nature.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
Question 29. In the questions given below have two statements labelled as Assertion (A) and Reason (R). In the context of the these two statements, which of the following option is correct?
Assertion (A): All acids generate hydrogen gas on reacting with metals.
Reason (R): Some metals are more reactive than hydrogen.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): All acids generate hydrogen gas on reacting with metals.
Reason (R): Some metals are more reactive than hydrogen.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
Question 30.In the questions given below have two statements labelled as Assertion (A) and Reason (R ). In the context of the these two statements, which of the following option is correct?
Assertion (A): A circuit is made by using glucose and alcohol solutions dosen't glow the bulb after closing the circuit.
Reason (R): Glucose and alcohol solutions is not a acidic solution.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
Assertion (A): A circuit is made by using glucose and alcohol solutions dosen't glow the bulb after closing the circuit.
Reason (R): Glucose and alcohol solutions is not a acidic solution.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
B). Both Assertion - (A) and Reason - R are true but Reason - R is not the correct explanation of Assertion - A .
C). Assertion - A is true but Reason - R is false.
D). Assertion - (A) is false but Reason - R is true.
A). Both Assertion - A and Reason - R are true and Reason - R is the correct explanation of Assertion- A.
