Igcse Model Questions Vol1 2018 Chemistry Question 15

Practice objective / multiple choice question 15 from the 2018 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Hard Difficulty
Question 15 IGCSE_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Phosphorus trichloride reacts with water according to the equation \(\mathrm{PCl_3 + 3 H_2O \rightarrow H_3PO_3 + 3 HCl}\). (a) If 5.00 g of solid \(\mathrm{PCl_3}\) is completely reacted with excess water, calculate the volume of \(\mathrm{HCl}\) gas produced at standard temperature and pressure (STP, 0 °C, 1 atm). (b) The gas is collected over water at 25 °C, where the vapour pressure of water is 23.8 mm Hg. If the total pressure in the collection container is 760 mm Hg, what volume of dry \(\mathrm{HCl}\) gas is collected?

Answer Options

Correct Answer A. a) 2.45 L at STP; b) 2.75 L of dry HCl at 25 °C and 760 mm Hg
B. a) 2.20 L at STP; b) 2.50 L of dry HCl at 25 °C and 760 mm Hg
C. a) 2.45 L at STP; b) 2.30 L of dry HCl at 25 °C and 760 mm Hg
D. a) 2.60 L at STP; b) 2.85 L of dry HCl at 25 °C and 760 mm Hg
Correct Answer
A
Correct Option:
a) 2.45 L at STP; b) 2.75 L of dry HCl at 25 °C and 760 mm Hg

About This Question

This is Igcse Model Questions Vol1 2018 Chemistry Question 15. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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