Question

A straight chain alkane is formed out of ten carbon atoms. How many hydrogen atoms will be there in that molecule?

• A. Forty
• B. Twenty two
• C. Twenty
• D. Twenty one

Answer 1

The correct option is B Twenty two

The general formula of a non-cyclic alkane is $C_n{H}_{2n+2}$, where 'n' is the number of carbon atoms. Hence, for an alkane having ten carbon atoms, there are $\text{(}2\times 10)+2=22$ hydrogen atoms.