Verified Solution • 2025–26 Session moderate

QAIPM-2011-Ch-1858: NEET 2011 Chemistry - Class 11 AIPM-2011-Ch-1858 Solution: For the reaction, \(N_2(g)+O_2(g) 2NO(g)\), the equilibrium…

For the reaction, N2(g)+O2(g)⇌2NO(g)N_2(g)+O_2(g)\rightleftharpoons 2NO(g), the equilibrium constant is K1K_1. The equilibrium constant is K2K_2 for the reaction, 2NO(g)+O2(g)⇌2NO2(g)2NO(g)+O_2(g)\rightleftharpoons 2NO_2(g). What is K for the reaction, NO2(g)⇌12N2(g)+O2(g)NO_2(g)\rightleftharpoons\frac{1}{2}N_2(g)+O_2(g)?

Multiple Choice Options

  • A 12K1K2\frac{1}{2K_1K_2}
  • B 14K1K2\frac{1}{4K_1K_2}
  • C [1K1K2]1/2\left[\frac{1}{K_1K_2}\right]^{1/2}
  • D 1K1K2\frac{1}{K_1K_2}

Step-by-Step Verified Solution

N 2(g) + 1 2 O 2(g) _ NO (g),     ( K 1 ) 1 2 NO (g) + 1 2 O 2(g) _ NO 2(g) ,     ( K 2 ) 1 2 --------------------------------------------------- 1 2 N 2(g) + O 2(g) _ NO 2(g)     ( K 1 K 2 ) 1 2 So, for the reverse reaction which is the desired one the value of K will be reciprocal of this value. i.e. K = [ 1 K 1 K 2 ] 1 / 2

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