A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Oct/Nov 2025 · Q211 Mark

In an experiment, 0.600 mol of chlorine gas, Cl2, is reacted with an excess of hot aqueous sodium hydroxide. One of the products is NaClO3. Which mass of NaClO3 is formed?

A21.3g

B44.7 g

C63.9g

D128 g

✓ Correct answer

A: 21.3g

Practise more questions on this topic

Oracle Prep sorts past-paper questions by topic, so you can drill Atoms, molecules and stoichiometry and see which topics are most likely to come up next.

About this question

Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 2, question 21.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Related Chemistry questions

Atoms, molecules and stoichiometryFeb/Mar 20161m

What is the volume of steam produced when 1.00g of ice is heated to 323°C at a pressure of 101 kPa?

Atoms, molecules and stoichiometryFeb/Mar 20171m

Compounds J and K each contain 40% carbon by mass. What could J and K be?

Atoms, molecules and stoichiometryFeb/Mar 20171m

In an experiment, 0.600 mol of chlorine gas, Cl₂, is reacted with an excess of hot aqueous sodium hydroxide. One of t…

EquilibriaFeb/Mar 20211m

A sample of 17.15 mol HI(g) is in dynamic equilibrium with 2.27 mol H₂(g) and 2.84 mol I₂(g) in a volume of 1 m³ at 7…

States of matterFeb/Mar 20211m

Many gases do not obey the general gas equation at high pressures. Why is this? 1 At higher pressures the molecules h…

Chemical bondingFeb/Mar 20211m

Which species can accept a lone pair of electrons to form a coordinate (dative covalent) bond? 1 BF₃ 2 H⁺ 3 CH₃⁺

← Browse all past-paper questions