Question

Assertion –Reason questions:

Note – Read the assertion and reason statements carefully and mark/write the correct option out

of the following options :

(a) If both assertion and reason are true and the reason is the correct explanation of the

assertion.

(b) If both the assertion and reason are true but the reason is the correct explanation of the

assertion.

(c) If assertion is true but reason is false .

(d) If both assertion and reason are false .


1. Assertion : Formula unit mass of CaCl2 is 111u.

Reason : 32 g of oxygen contains 6.022x 10 23 molecules.


2. Assertion : The valency of phosphate radical is -4.

Reason : 2g of hydrogen contains 6.022 x 1023 atoms.

3. Assertion : The formula of sodium carbonate is Na2CO3 .

Reason: While writing the formula of a compound ,the valencies of the cation and anion
are crossed .​

Answer 1

Answer:

(a) If both assertion and reason are true and the reason is the correct explanation of the

assertion.

(b) If both the assertion and reason are true but the reason is the correct explanation of the

assertion.

(c) If assertion is true but reason is false .

(d) If both assertion and reason are false .

1. Assertion : Formula unit mass of CaCl2 is 111u.

Reason : 32 g of oxygen contains 6.022x 10 23 molecules.

2. Assertion : The valency of phosphate radical is -4.

Reason : 2g of hydrogen contains 6.022 x 1023 atoms.

3. Assertion

Answer 2

Answer:

1. c

2. b

3. c

I hope this helps you