Question

Which form of sulphur shows paramagnetic behaviour?

Answer 1

Paramagnetic behaviour of sulphur

Sulphur exists as $S_8$ molecule at ordinary temperature and pressure but at elevated temperature it gets dissociated and partly
exists as $S_2$ molecule in vapour phase.

$S_2$ molecule has two unpaired electrons in the antibonding ${\pi }^{\ast }$ orbitals like $O_2$ molecule and Hence, exhibits paramagnetism.

Hence, sulphur in $S_2$ form shows paramagnetic behaviour.

Final answer: $S_2$ form