Question

If an alkane contain n number of carbon atoms the number of oxygen molecules required for combustion of alkane is ______.

Options

• `(3"n" + 1)/2`

• `(2"n" + 1)/2`

• 2n + 1

• n

Answer 1

If an alkane contain n number of carbon atoms the number of oxygen molecules required for combustion of alkane is `bbunderline((3"n" + 1)/2)`.

Explanation:

The chemical reaction of complete combustion of alkane is as follows:

`"C"_"n""H"_(2"n" + 2) + ((3"n" + 1)/2) "O"_2 -> "n CO"_2 + ("n + 1") "H"_2"O"`

where n = number of carbon atoms.