Q. 38

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A) : The empirical mass of ethene is half of its molecular mass.

Reason (R) : The empirical formula represents the simplest whole number ratio of various atoms present in a compound.

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

B. A is true but R is false.

C. A is false but R is true.

D. Both A and R are false.

Answer :

The molecular formula of ethene is C2H4 and the empirical formula is CH2. The molecular mass of ethene is 28 and the empirical mass is 14. The empirical mass is half of its molecular mass. The empirical formula shows that the ratio of C:H is 1:2.

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