Question

*Concentrated hydrochloric acid reacts with zinc to form ______ gas.*

1️⃣ hydrogen
2️⃣ oxygen
3️⃣ sulphur dioxide
4️⃣ carbon dioxide​

Answer 1

Hydrogen gas is produced through the reaction of "mossy" metallic zinc and hydrochloric acid. The resulting hydrogen may be captured and burned with great effect!

Answer 2

Concentrated hydrochloric acid reacts with zinc to form $\sf \pmb{hydrogen}$ gas.