Question

Organic compound X and Y containing carbon and hydrogen only have vapour density 13 and 39 respectively state the molecular formula of xand Yy

Answer 1

Molecular weight =2 x vapour density
For X, we have mol. Wt= 2 x 13=26
Therefore, formula is C2H2
Similarly for Y, mol wt=2 x 39=78
Formula= C6H6( benzene)