Question

What do we call the hydrocarbon that has formula `C_5H_12` that CONTAINS only methyl hydrogens? `"A. Isopentane;"` `"B. Neopentane;"` `"C. 2,2-dimethylpentane;"` `"D. n-pentane."`

Answer 1

`"B. Neopentane"`

Explanation:

`"Neopentane"` `-=` `C(CH_3)_4`. Here, all the hydrogens are bound to a primary carbon centre. The central carbon is quaternary and bound to 4 carbons.

You should draw structures of the other molecules to verify their connectivity.