Igcse Model Questions Vol1 2017 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Hard Difficulty
Question 20 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

A sample of \(2.00\ \text{g}\) of chlorine gas (\(\text{Cl}_2\)) is collected over water at \(25^{\circ}\text{C}\) and a total pressure of \(760\ \text{mmHg}\). The vapour pressure of water at this temperature is \(23.8\ \text{mmHg}\).\n\n(a) Calculate the volume of dry \(\text{Cl}_2\) gas collected, assuming ideal behaviour.\n\n(b) The dry chlorine gas is then reacted with excess sodium metal according to \(\text{Cl}_2 + 2\text{Na} \rightarrow 2\text{NaCl}\). Determine the theoretical mass of sodium chloride that can be formed.\n\n(c) If the actual mass of sodium chloride obtained after the reaction is \(2.80\ \text{g}\), calculate the percentage yield of the reaction.

Answer Options

A. (a) 0.68 L; (b) 3.10 g; (c) 80 % (to nearest percent)
B. (a) 0.65 L; (b) 3.00 g; (c) 78 % (to nearest percent)
C. (a) 0.78 L; (b) 3.45 g; (c) 92 % (to nearest percent)
Correct Answer D. (a) 0.71 L; (b) 3.30 g; (c) 85 % (to nearest percent)
Correct Answer
D
Correct Option:
(a) 0.71 L; (b) 3.30 g; (c) 85 % (to nearest percent)

About This Question

This is Igcse Model Questions Vol1 2017 Chemistry Question 20. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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