QUICK QUIZ

Chemistry practice

5 questions · single correct answer · +1 correct, 0 incorrect/unanswered. Suggested time: 10 minutes. Practice scoring, not an official exam marking scheme.

Guest attempt: results are shown after submission but are not saved to an account.

Question 1 · Chemistry · Mole concept

How many moles are present in 18 g of water? Use molar mass 18 g/mol.

A. 0.5 molB. 1 molC. 2 molD. 18 mol

Question 2 · Chemistry · Mole concept

At the same temperature and pressure, equal volumes of ideal gases contain equal:

A. MassesB. DensitiesC. Numbers of moleculesD. Molar masses

Question 3 · Chemistry · Atomic structure

The maximum number of electrons in a shell with principal quantum number n = 2 is:

A. 2B. 4C. 8D. 18

Question 4 · Chemistry · Atomic structure

Isotopes of an element have the same number of:

A. NeutronsB. ProtonsC. NucleonsD. Neutrons plus electrons

Question 5 · Chemistry · Solutions

An ideal solution obeys:

A. Raoult’s law over the entire composition rangeB. Only Boyle’s lawC. Only the law of multiple proportionsD. No vapour-pressure relationship