Question

please solve this questions

Answer 1

go though the following attachments.

Answer 2

For this type of MCQs, you don't need to ponder your head over percentage calculations,

here, vapour density is given
we know that, V.D = Molecular mass/2

so, M= 2 * 15 =30

now , go through options
check which hydrocarbon satisfies 30 as molecular mass

yeah! its option (c)
C2H6

#Alvida
:)