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”