Igcse Model Questions Vol1 2022 Chemistry Question 7

Practice objective / multiple choice question 7 from the 2022 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 7 IGCSE_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

A pure solid oxide of an unknown non‑metal X has the formula \(X_2O_3\). When 1.10 g of this oxide is heated, it decomposes according to \(2X_2O_3 \rightarrow 4X + 3O_2\) and 0.48 g of \(O_2\) gas is collected. Determine the atomic mass of X (in g mol\(^{-1}\)) and identify the element from the list: sulfur (S), phosphorus (P), silicon (Si), chlorine (Cl).

Answer Options

A. 34 g mol⁻¹; the element is chlorine
Correct Answer B. 31 g mol⁻¹; the element is phosphorus
C. 28 g mol⁻¹; the element is silicon
D. 35 g mol⁻¹; the element is sulfur
Correct Answer
B
Correct Option:
31 g mol⁻¹; the element is phosphorus

About This Question

This is Igcse Model Questions Vol1 2022 Chemistry Question 7. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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