COMEDK · Chemistry · 7. Chemical Equilibrium

In the synthesis of ammonia
\(\mathrm{N}_{2}+3 \mathrm{H}_{2}=2 \mathrm{NH}_{3}\) \(a, K=K_{C} R T\)

A \(K_{p}=K_{C} R T\)
B \(K_{p}=K_{C}\)
C \(K_{p}=K_{C}(R T)^{-2}\)
D \(K_{p}=K_{C}(R T)^{-1}\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(K_{p}=K_{C}(R T)^{-2}\)

Step-by-step Solution

Detailed explanation

For the following reaction,…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

The enthalpy change accompanying the freezing of 18 g of water at \(5^{\circ} \mathrm{C}\) to ice at \(-5^{\circ} \mathrm{C}\) is:
[Given: \(\Delta H_{(\text {fusion })}=6 \mathrm{~kJ} \mathrm{~mol}^{-1}\) at \(0^{\circ} \mathrm{C} ; \quad C_p\left(H_2 \mathrm{O}, l\right)=75.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1} ; \quad C_p\left(H_2 \mathrm{O}, s\right)=36.8 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\) ]

COMEDK 2025 Medium

Match the names of reactions given in Column I with the appropriate reactions given in Column II.

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No.	Name of reaction	No.	Equations representing reactions
A	Sandmeyer	P	\(2C_6H_5Cl + Na\) (dry ether) \(\to\) Diphenyl
B	Fittig	Q	\(CH_3 - CHBr - CH_3 + AgF \to CH_3 - CHF - CH_3 + AgBr\)
C	Swarts	R	\(CH_3 - CH_2 - Br + NaI\) (Acetone) \(\to CH_3 - CH_2 - I + NaBr\)
D	Finkelstein	S	\(C_6H_5N_2^+ Cl^- + Cu_2Br_2/HBr \to C_6H_5Br + N_2\)

COMEDK 2024 Medium

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In the synthesis of ammonia\(\mathrm{N}_{2}+3 \mathrm{H}_{2}=2 \mathrm{NH}_{3}\) \(a, K=K_{C} R T\)

Step-by-step Solution

In the synthesis of ammonia
\(\mathrm{N}_{2}+3 \mathrm{H}_{2}=2 \mathrm{NH}_{3}\) \(a, K=K_{C} R T\)