A compound contains two elements 'X' and 'Y' in the ratio of 50% each. Atomic mass 'X' is 20 and 'Y' is 40. what can be its simplest formula?

Options

A. XY
B. `X_2Y`
C. `XY_2`
D. `X_2Y_3`

Answer

B

Explanation

Percentage of element 'X' = 50, mole ratio `=(50)/(40) =2.5`
Percentage of element 'Y' = 50, mole ratio `=(50)/(40)=1.25`
For 'X' simple ratio = `2.5// 1.25` = 2
For 'Y' simple ratio = `1.25// 1.25` = 1
Formula = `X_2Y`