Which of the following is a gas-evolution reaction?
A) 2C2H6(l) + 7O2(g) → 4CO2(g) + 6H2O(g)
B) 2H2(g) + O2(g) → 2H2O(g)
C) LiCl(aq) + NaNO3(aq) → LiNO3(aq) + NaCl(aq)
D) NH4Cl(aq) + KOH(aq) → KCl(aq) + NH3(g) + H2O(l)
E) None of the above is a gas-evolution reaction.
Correct Answer:
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