AIIMS2019Chemistry-Stoichiometry

AIIMS 2019 Chemistry Empirical Formula MCQ Question

Type: MCQ-numerical-Medium-Class 11

Find empirical formula of the compound if $\text{M} = 68\%$ (Atomic mass $= 34$ ) and remaining $32\%$ oxygen:

$\text{MO}$

$\text{M}_2\text{O}$

$\text{MO}_2$

$\text{M}_2\text{O}_3$

Correct Answer

Option B

Detailed Explanation

To determine the empirical formula, we first calculate the moles of M and O based on their atomic masses and abundances. With M having an atomic mass of 34 g/mol and an abundance of 68%, and O having an atomic mass of 16 g/mol and an abundance of 32%, we find the ratio of moles of M to O is 1:1, leading to the empirical formula of MO. Other options are not relevant as they do not provide valid empirical formulas based on the given data.

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