Petroleum Refinery Engineering
Waxes present in petroleum products

Are not soluble in them
Decrease their viscosity
Crystallise out at low temperature
Can be separated out by distillation

ANSWER DOWNLOAD EXAMIANS APP

Petroleum Refinery Engineering
Mercaptans are

Low boiling sulphur compounds
Added in LPG cylinders to detect gas leakage by its smell
All of these
Undesirable in petrol, as they reduce its octane number

ANSWER DOWNLOAD EXAMIANS APP