Question

. The melting points of

I. n-pentane

II. isopentane

III. neopentane

decrease in the order:

(a) III > I > II (b) I > II > III (c) II > I > III (d) III > II > I​

Answer 1

is one of the three structural isomers with the molecular formula C5H12 (pentanes), the other two being n-pentane and isopentane.

...

Neopentane.

Names

Appearance Colorless gas

Odor Odorless

Density 3.255 kg/m3 (gas, 9.5 °C) 601.172 kg/m3 (liquid, 9.5 °C)

Melting point −16.5 °C (2.3 °F; 256.6