Question

Chemistry NTSE Question Copper does not react with dilute HCl but reacts in the presence of air or oxygen because (a) copper is ranked lower than hydrogen in the activity series (b) HCl is not an oxidizing agent (c) air or oxygen oxidises the the copper metal to copper 2 ion (d) all of these

Answer 1

All a, b, and c are the reasons.
Answer is D.

Answer 2

Copper doesn't react with HCl because,
it was ranked lower, HCl is an oxidising agent, air or oxygen oxidises it.
Do, the answer is option d). all of these.