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6.1. Equilibrium - 1 (chemical Equilibrium) — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.1. Equilibrium - 1 (chemical Equilibrium)1 Mark
MCQ
Assertion : For reaction $N_2 (g) + 3H_2 (g)  \rightleftharpoons  2NH_3(g)$ Unit of $K_C = L^2\,mol^{-2}$
Reason : For the reaction $N_2 (g) + 3H_2 (g)  \rightleftharpoons  2NH_3(g)$ 

Equilibrium constant, ${K_C} = \frac{{{{[N{H_3}]}^2}}}{{[{N_2}]{{[{H_2}]}^3}}}$

  • ✓
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: A.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
a
For the reaction

${K_c} = \frac{{{{[N{H_3}]}^2}}}{{[{N_2}]{{[{H_2}]}^3}}}$

${K_c} = \frac{{mo{l^2} \times L \times {L^3}}}{{{L^2} \times mol \times mo{l^3}}} = {L^2}\,mo{l^{ - 2}}$

So, the units for $K_c$ are $L^2\,mol^{-2}$

The assertion and reason, both are true and reason is correct explanation of assertion.

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