which chemical reaction involves the production of a gas?\no 2li(s) + f₂(g) → 2lif(s)\no zn(s) + 2hcl(aq) →…

which chemical reaction involves the production of a gas?\no 2li(s) + f₂(g) → 2lif(s)\no zn(s) + 2hcl(aq) → h₂(g) + zncl₂(aq)\no hno₃(l) + h₂o(l) → h₃o⁺(aq) + no₃⁻(aq)\no k₂cro₄(aq) + ba(no₃)₂(aq) → bacro₄(s) + 2kno₃(aq)

which chemical reaction involves the production of a gas?\no 2li(s) + f₂(g) → 2lif(s)\no zn(s) + 2hcl(aq) → h₂(g) + zncl₂(aq)\no hno₃(l) + h₂o(l) → h₃o⁺(aq) + no₃⁻(aq)\no k₂cro₄(aq) + ba(no₃)₂(aq) → bacro₄(s) + 2kno₃(aq)

Answer

Explanation:

Step1: Analyze first reaction

$2Li(s)+F_2(g)\rightarrow 2LiF(s)$ has no gas production as reactant $F_2$ is consumed and solid $LiF$ is formed.

Step2: Analyze second reaction

$Zn(s)+2HCl(aq)\rightarrow H_2(g)+ZnCl_2(aq)$ produces hydrogen gas $H_2(g)$ as a product.

Step3: Analyze third reaction

$HNO_3(l)+H_2O(l)\rightarrow H_3O^{+}(aq)+NO_3^{-}(aq)$ is a dissociation in solution, no gas is produced.

Step4: Analyze fourth reaction

$K_2CrO_4(aq)+Ba(NO_3)_2(aq)\rightarrow BaCrO_4(s)+2KNO_3(aq)$ is a precipitation reaction, no gas is produced.

Answer:

$Zn(s)+2HCl(aq)\rightarrow H_2(g)+ZnCl_2(aq)$