Mustard gas is obtained by
The action of dilute acids on mustard seeds
Treating ethylene with mustard oil
Treating sulphur chloride with ethylene
None of these
Mustard gas is the organic compound with formula (ClCH2CH2)2S. mustard gas is synthesized by treating sulfur dichloride with ethylene.
SCl2+2C2H4→(ClCH2CH2)2S