Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

206) When two reactants A and B are mixed to give products C and D, the reaction quotient Q, at the initial stages of the reaction:

Answer is:

Is zero

207) 6 gm hydrogen reacts with 9.023 x 10²³ chlorine molecules to form HCl. If total pressure of the reaction is 800 mm, then partial pressure of HCl will be:

Answer is:

533 mm

208) 20% part of N₂O₄ is dissociated in NO₂ at 1 atm pressure, then the value of K_p will be:

Answer is:

None of these

Explanation:

K_p = 4x₂P⁄(1 − x₂)

209) Vapourisation 1 mol of PCl₅ is done in a 1 L container. If 0.2 mol of Cl₂ is formed at equilibrium, then what will be the value of equilibrium constant?

Answer is:

0.05

210) The vapour density of N₂O₄ at a certain temperature is 30. Calculate the percentage dissociation of N₂O₄ at this temperature:

Answer is:

53.5 atm

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