Chemical EquilibriumhardMCQ MULTIPLE

Which of the following statements is/are mathematically correct regarding the dissociation of takingChemical Equilibrium Chemistry Question

Question

Which of the following statements is/are mathematically correct regarding the dissociation of $N_2O_4(g) \rightleftharpoons 2NO_2(g)$ taking place in a closed vessel at constant temperature?

Answer: A,B,C

💡 Solution & Explanation

Theoretical vapour density $D = \text{Molar Mass}/2 = 92/2 = 46$ (A is correct). If $\alpha = 0$ (no dissociation), $d = D = 46$ (B is correct). If $\alpha = 1$ (100% dissociation), $d = \frac{D}{1+1} = 46/2 = 23$ (C is correct). By formula $d = \frac{D}{1+\alpha}$, as $\alpha$ increases, the denominator increases, so $d$ MUST decrease, not increase (D is false).

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