JEE MAIN - Chemistry (2005 - No. 14)

2 methylbutane on reacting with bromine in the presence of sunlight gives mainly

1 – bromo -2 - methylbutane

2 – bromo -2 - methylbutane

2 – bromo -3 - methylbutane

1 – bromo -3 – methylbutane

Ease of replacement of $$H$$-atom $${3^ \circ } > {2^ \circ } > {1^ \circ }.$$