0.246 gm of an organic compound gave 0.198 gm of carbon dioxide and 0.1014 gm of water on complete combustion. 0.37 gm of the compound gave 0.638 gm of silver bromide. [Vapour density of the compound is 54.4]
What is the value of 'n' For the given compound?

Options

A. 3
B. 2
C. 4
D. 1

Answer

D

Explanation

Vapour density of the compound = 54.4
`:.` molecular mass of the compound `=2 xx` vapour density `=2 xx 54.4 = 108.8 `
But the empirical formula mass of the compound `C_2H_5Br =2 xx 12+5xx1+1 xx 80 = 109 `
`:. n = ("Molecular mass")/("Empirical formula mass ")=(108.8)/(109)` = 1(approx.)