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Chemical Equilibrium question

2003 · Q109
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Chemical Equilibrium question

2003 · Q109

NEETChemistryChemical EquilibriumMCQ+4 / −1
The equilibrium constants of the following are

N2 + 3H2 ⇌\rightleftharpoons⇌ 2NH3;     K1

N2 + O2 ⇌\rightleftharpoons⇌ 2NO;     K2

H2 + 12{1 \over 2}21​O2 ⇌\rightleftharpoons⇌ H2O;     K3

The equilibrium constant (K) of the reaction :

2NH3 + 52{5 \over 2}25​ O2 ⇌\rightleftharpoons⇌ 2NO + 3H2O will be
  1. A
    K2K33/K1
  2. B
    K2K3/K1
  3. C
    K23K3/K1
  4. D
    K1K33/K2
View written solutionFree

Correct answer: A

2NH3 ⇌\rightleftharpoons⇌ N2 + 3H2;     1K1{1 \over {{K_1}}}K1​1​

N2 + O2 ⇌\rightleftharpoons⇌ 2NO;     K2

3H2 + 32{3 \over 2}23​O2 ⇌\rightleftharpoons⇌ 3H2O;     (K3)3

By adding all equations, we get

2NH3 + 52{5 \over 2}25​ O2 ⇌\rightleftharpoons⇌ 2NO + 3H2O

∴\therefore∴ K = K2×(K3)3K1{{{K_2} \times {{\left( {{K_3}} \right)}^3}} \over {{K_1}}}K1​K2​×(K3​)3​

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