Single Choice

The relative number of atoms of elements, $$X$$ and $$Y$$ in a compound is 0.25 and 0.5. The empirical formula of compound is:

A$$XY$$
B$$X_2Y$$
C$$XY_2$$
Correct Answer
D$$X_2Y_2$$

Solution

Let the empirical formula be $$X_aY_b$$

Atoms of $$X=0.25$$

Atoms of $$Y=0.5$$

% of $$X=$$ $$0.25/(0.25+0.5) \times 100=33$$%

% of $$Y=$$ $$0.5/(0.25+0.5) \times 100=67$$%

The simplest ratio of the two is $$XY_2$$.

Hence, option $$C$$ is correct.

SIMILAR QUESTIONS

Mole Concept

$$14$$ g of an element X combines with $$16$$ g of oxygen. On the basis of this, which of the following statement is correct? [At.wt of oxygen $$= 16$$]

Mole Concept

The relative number of atoms of different elements in a compound are as follows: $$A =$$ $$1.33$$, $$B =$$ $$1$$ and $$C$$ $$=$$ $$1.5$$. The empirical formula of the compound is:

Mole Concept

The empirical formula and the percent composition of dimethyhydrazine, $$C_2H_8N_2$$ which is a colourless liquid used as a rocket fuel, are $$CH_4N, C:40\%$$, $$H: 13.3\% $$ and $$ N:46.7\%$$. If true enter 1, else enter 0.

Mole Concept

An experiment showed that in a lead chloride solution, 6.21 g of lead combined with 4.26 g of chlorine. The empirical formula of this chloride is:

Mole Concept

Determine the empirical formula of an oxide of iron which has $$69.9\%$$ iron and $$30.1\%$$ dioxygen by mass.

Mole Concept

Two elements 'P' and 'Q' combine to form a compound. Atomic mass of 'P' is 12 and 'Q' is 16. Percentage of 'P' in the compound is 27.3. What will be the empirical formula of the compound?

Mole Concept

An organic compound contains $$C = 40$$%, $$O= 53.5$$%, and $$H = 6.5$$%. The empirical formula of the compound is:

Mole Concept

A compound containing $$80$$% $$C$$ and $$20$$% $$H$$ is likely to be :

Mole Concept

$$60\ gm$$ of an organic compound on analysis is found to have $$C = 24\ g, H = 4\ g$$ and $$O = 32\ g$$. The empirical formula of compound is:

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