Question

a compound with empirical formula ch2 has a vapour density of 30 its molecular formula is​

Answer 1

we know that vapour density=molecular mass/2

so, molecular mass of the compound is 60

now,empirical mass=12+16+2=30

molecular mass=60

n=molecular mass/empirical mass

n=60/30

n=2

so,molcular formula will be n×empirical formula=2×CH2O

=C2H4O2

so answer is option B)