Question

The simplest formulae of a compound containing 50% of element X (atomic wt. 10) and 50% of element Y (atomic wt. 20) is

(a) XY

(b) X₂Y

(c) XY₃

(d) X₂Y₃

Answer 1

Correct option is (b) X₂Y

Mole atoms of X = \(\frac{50}{10}\) = 5; Mole atoms of Y = \(\frac{50}{20}\) = 2.5

Ratio of mole atoms of X and Y = 5 : 2.5 = 2:1