Question

Which of the following reactions has the ratio of volumes of reacting gases and the product as 1:2:2?
(A) 2CO_{(g)} + O_{2(g)} = 2CO_{2(g)}
(B) O_{2(g)} + 2H_{2(g)} = 2H_{2}O_{(g)}
(C) H_{2(g)} + F_{2(g)} = 2HF_{(g)}
(D) N_{2(g)} + 3H_{2(g)} = 2NH_{3(g)}

Answer 1

Dear Student,

◆ Answer -

(B) O2(g + 2H2(g) = 2H2O(g)

● Explaination -

According to Avogadro's law, equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

Reaction,

O2(g + 2H2(g) = 2H2O(g)

In above reaction, 1 molecule of O2(g) and 2 molecules of H2(g) react to give 2 molecules of H2O(g).

Hence according to Avogadro's law, 1 volume of O2(g) and 2 volumes of H2(g) react to give 2 volumes of H2O(g).

Therefore, ratio of volumes of reacting gases and the product in the reaction is 1:2:2.

Thanks dear. Hope this helps you...