What is the degree (or element) of unsaturation for `C_(4)H_(8)`?

Options

A. Zero
B. One
C. Two
D. Three

Answer

B

Explanation

The number of pairs of hydrogen a molecular formula lacks to be an alkane `(C_(n)H_(2n+2))` is called the degree (or element ) of unsaturation, sometimes called the index of hydrogen deficiency. The compound `C_(4)H_(8)`lacks one pair of hydrogen relative to the corresponding alkane `C_(4)H_(10)`