Igcse Model Questions Vol1 2017 Chemistry Question 35

Practice objective / multiple choice question 35 from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Hard Difficulty
Question 35 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

Two unknown metals, X and Y, each react with excess dilute HCl according to \(\mathrm{M + 2HCl \rightarrow MCl_{2} + H_{2}}\). When 1.00 g of metal X reacts, 0.401 L of hydrogen gas is collected at STP; when 1.00 g of metal Y reacts under the same conditions, 0.342 L of hydrogen is collected at STP. Both metals belong to the first transition series (Sc to Zn). Determine the molar masses of X and Y and identify each metal.

Answer Options

Correct Answer A. Molar mass of X ≈ 56 g mol⁻¹ (iron); Molar mass of Y ≈ 65.5 g mol⁻¹ (zinc)
B. Molar mass of X ≈ 55.8 g mol⁻¹ (iron); Molar mass of Y ≈ 64.0 g mol⁻¹ (cobalt)
C. Molar mass of X ≈ 58.7 g mol⁻¹ (nickel); Molar mass of Y ≈ 63.5 g mol⁻¹ (copper)
D. Molar mass of X ≈ 59.0 g mol⁻¹ (cobalt); Molar mass of Y ≈ 66.0 g mol⁻¹ (zinc)
Correct Answer
A
Correct Option:
Molar mass of X ≈ 56 g mol⁻¹ (iron); Molar mass of Y ≈ 65.5 g mol⁻¹ (zinc)

About This Question

This is Igcse Model Questions Vol1 2017 Chemistry Question 35. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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