Volatile (adjective)
بدلتے مزاج والا، غیر مستحکم
(of a substance) easily evaporated at normal temperatures.
Example: “volatile solvents such as petroleum ether, hexane, and benzene”
Scepticism (noun)
شک کی نظر سے دیکھنا
a sceptical attitude; doubt as to the truth of something.
Example: “these claims were treated with scepticism”