Question

A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be:

• A. 196
• B. 198
• C. 200
• D. 202

Answer 1

The correct option is C

200

A hydrocarbon has one double bond so it must be Alkene.

The general formula of alkene is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}$. Here, n is the number of carbon atoms present in the molecule.

The carbon atom present in its molecule is 100. So, the value of n is 100.

Now, Substitute the value of n = 100 in general formula ${\mathrm{C}}_{100}{\mathrm{H}}_{200}$

Hence, the total number of hydrogen atoms is 200.

Option C is correct answer.