Question

The following questions consist of two statements — Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.

(d) A is false but R is true.

1. Assertion (A) : Hydrogen gas is not evolved when a metal reacts with nitric acid.

Reason (R) : Nitric acid is a strong oxidising agent.

2. Assertion (A) : Zinc becomes dull in moist air.

Reason (R) : Zinc is coated by a thin film of its basic carbonate in moist air.

3. Assertion (A) : Aluminium is used in making food wrappers.

Reason (R) : Aluminium is highly malleable and has high melting point.

4. Assertion (A) : Zinc oxide is amphoteric in nature.

Reason (R) : Zinc oxide reacts with both acids and bases.

5. Assertion (A) : Magnesium chloride is an ionic compound.

Reason (R) : Metals and non-metals react by mutual transfer of electrons.

6. Assertion (A) : Zinc can easily displace copper on reacting with a solution of copper sulphate.

Reason (R) : Copper is more reactive metal as compared to Zinc.

7. Assertion (A) : MgCl2 is a covalent compound.

Reason (R) : MgCl2 is a good conductor of electricity in molten state.

Answer 1

Answer:

1. option (a) Both A & R are true and R is the correct explanation of A.

2. option (a) Both A and R are true and R is the correct explanation of A.

3. option (a) Both A and R are true and R is the correct explanation of A.

4. option (a) Both A and R are true and R is the correct explanation of A.

5. option (a) Both A and R are true and R is the correct explanation of A.

6. option (a) Both A and R are true and R is the correct explanation of A.

7. option (a) Both A and R are true and R is the correct explanation of A.