Igcse Model Questions Vol1 2023 Chemistry Question 19

Practice objective / multiple choice question 19 from the 2023 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2023 Chemistry Objective / Multiple Choice Medium Difficulty

Question 19 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • objective

Igcse Model Questions Vol1 2023 Chemistry Question 19 diagram

A gas‑collection‑over‑water apparatus is used to collect hydrogen gas produced from the reaction of excess zinc with excess hydrochloric acid. The apparatus is at 25 °C. The total pressure inside the collection tube is 760 mmHg and the water‑vapour pressure at this temperature is 23.8 mmHg. The volume of gas collected is 0.850 dm³. Calculate the number of moles of hydrogen gas collected, correcting for the water vapour.

Answer Options

A. 5.0×10^{-2} mol

Correct Answer B. 3.4×10^{-2} mol

C. 2.8×10^{-2} mol

D. 4.1×10^{-2} mol

Correct Answer

Correct Option:

3.4×10^{-2} mol

About This Question

This is Igcse Model Questions Vol1 2023 Chemistry Question 19. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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