CUET · CHEMISTRY · PYQ PAPER 2025
A solution of 2.5 g of ethanoic acid in 75 g of benzene is prepared. What is the molar mass of ethanoic acid, moles of ethanoic acid, mass of benzene and molality of ethanoic acid?
(A) \(0.556 \text{ mol } kg^{-1}\)
(B) \(0.0417 \text{ mol}\)
(C) \(60 \text{ g } mol^{-1}\)
(D) \(0.075 \text{ kg}\)
Choose the correct answer from the options given below:
- A (A), (B), (C), (D)
- B (A), (B), (D), (C)
- C (B), (A), (D), (C)
- D (C), (B), (D), (A)
Answer & Solution
Correct Answer
(D) (C), (B), (D), (A)
Step-by-step Solution
Detailed explanation
Molar mass \((\text{CH}_3\text{COOH}) = 2(12.01) + 4(1.008) + 2(16.00) = 60.052 \text{ g } mol^{-1} \approx 60 \text{ g } mol^{-1}\) Moles \((\text{CH}_3\text{COOH}) = \frac{2.5 \text{ g}}{60 \text{ g } mol^{-1}} = 0.04166... \text{ mol} \approx 0.0417 \text{ mol}\) Mass…
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