Question

Direction: In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason. Of the statements, mark the correct answer as

(a) Both assertion and reason are true and reason is the correct explanation of assertion.

(b) Both assertion and reason are true but reason is not the correct explanation of assertion.

(c) Assertion is true but reason is false.

(d) Assertion is false but reason is true



Q8. Assertion: The number of particles present in one mole of a substance is fixed.

Reason: The mass of one mole of a substance is equal to its relative atomic mass in grams.



Q9. Assertion: Atomicity of ozone is three while that of oxygen is two.

Reason: Atomicity is the number of atoms constituting a molecule.​

Answer 1

Explanation:

each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as: (a) Both assertion and reason are true and reason is the correct explanation of assertion.

The number of particles present in one mole of a substance is fixed. Reason: The mass of one mole of a substance is equal to its relative atomic mass in grams. Question 2.7

We know that one ozone molecule is composed of three atoms. Therefore, its atomicity will be three. In other words, we can say that ozone is a triatomic molecule whereas oxygen is a diatomic molecule.