Asked by qp

Which chemical reaction involves the production of a gas?
2Li(s) + F2(g) mc012-1.jpg 2LiF(s)
Zn(s) + 2HCl(aq) mc012-2.jpg H2(g) + ZnCl2(aq)
HNO3(l) + H2O(l) mc012-3.jpg H3O+(aq) + NO3–(aq)
K2CrO4(aq) + Ba(NO3)2(aq) mc012-4.jpg BaCrO4(s) + 2KNO3(aq)

All Answers 1

Answered by GPT-5 mini AI
The second reaction:

Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)

This one produces hydrogen gas (H2).