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Characteristics of Chemical Equilibrium

For which of ...

Question

For which of the following reactions, the degree of dissociation cannot be calculated from the vapour density data
$I . 2 H I_{(g)} ⇌ H_{2 (g)} + I_{2 (g)}$
$I I . 2 N H_{3 (g)} ⇌ N_{2 (g)} + 3 H_{2 (g)}$
$I I I . 2 N O_{(g)} ⇌ N_{2 (g)} + O_{2 (g)}$
$I V . P C l_{5 (g)} ⇌ P C l_{3 (g)} + C l_{2 (g)}$

I and III

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II and IV

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I and II

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III and IV

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Solution

The correct option is A I and III
For the reactions I and III,
$I . 2 H I_{(g)} ⇌ H_{2 (g)} + I_{2 (g)}$
$I I I . 2 N O_{(g)} ⇌ N_{2 (g)} + O_{2 (g)}$
the number of moles of the reactants is same as that of the products. Hence, for these reactions, the degree of dissociation can not be calculated from the vapour density data.

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Similar questions

2 H I_{(g)} ⟶ H_{2 (g)} + I_{2 (g)}

2 N H_{3 (g)} ⟶ N_{2 (g)} + 3 H_{2 (g)}

2 N O_{(g)} ⟶ N_{2 (g)} + O_{2 (g)}

P C l_{5 (g)} ⟶ P C l_{3 (g)} + C l_{2 (g)}

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

2 H I (g) ⇌ H_{2} (g) + I_{2} (g)

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)

0.01 M

P C l_{s} (g) ⇌ {P C l}_{3} (g) + C l_{2} (g)

{2 H I (g) ⇋ H}_{2} (g) + l_{2} (g)

N_{2} (g) + 3 H_{2} (g) ⇋ {2 N H}_{3} (g)

K_{1}

K_{2}

N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)

N O (g) ⇌ N_{2} (g) + \frac{1}{2} O_{2} (g)

I . A g^{+} (a q) + C l^{-} (a q) \to A g C l (s)

I I . N H_{4} C l (s) \to N H_{3} (g) + H C l (g)

I I I . 2 N H_{3} (g) \to N_{2} (g) + 3 H_{2} (g)

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