Gce Model Questions Vol1 2022 Chemistry Question 46

Practice objective / multiple choice question 46 from the 2022 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 46 GCE_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

A 10.0 g alloy consists of zinc and copper in the mass ratio 7 : 3. The alloy is treated with excess dilute hydrochloric acid, which reacts only with zinc to produce hydrogen gas collected over water at \(25^\circ\text{C}\) and \(750\ \text{mmHg}\). The volume of gas collected is \(1.20\ \text{L}\). (a) Calculate the mass of zinc that has reacted. (b) Determine the mass of the solid residue after the reaction. (c) State the mass of copper present in the residue.

Answer Options

Correct Answer A. a) 3.08 g Zn reacted; b) 6.92 g residue; c) 3.00 g Cu
B. a) 2.75 g Zn reacted; b) 7.25 g residue; c) 2.90 g Cu
C. a) 2.90 g Zn reacted; b) 7.10 g residue; c) 3.10 g Cu
D. a) 3.50 g Zn reacted; b) 6.50 g residue; c) 2.80 g Cu
Correct Answer
A
Correct Option:
a) 3.08 g Zn reacted; b) 6.92 g residue; c) 3.00 g Cu

About This Question

This is Gce Model Questions Vol1 2022 Chemistry Question 46. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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