Exam Practice

Structure 1: Comprehensive Review

Test your understanding of Topics 1.1 - 1.5 with IB-style questions.

Paper 1A|MCQ

Paper 1B|Data

Paper 2|Written

Paper 1A: Multiple Choice

Conditions: No Calculator. No Data Booklet. Average 1.5 mins per question.

Which transition in the hydrogen atom emits visible light?

What is the mass of {`\( 6.02 \times 10^{22} \)`} atoms of Magnesium (Ar = 24.31)?

Which species is isoelectronic with {`\( Cl^- \)`}?

Under which conditions does a real gas behave most ideally?

Which electron configuration represents a Copper (Cu) atom in its ground state?

A compound contains 40.0% C, 6.7% H, and 53.3% O by mass. What is its empirical formula? (Ar: C=12, H=1, O=16)

Which statement about the mass spectrum of Magnesium is correct?

Context:

You are provided with a graph showing the Successive Ionization Energies of an unknown element X.

[3 Marks]

The log(IE) values show a small jump between the 2nd and 3rd electron, but a massive jump between the 5th and 6th electron.

Deduce the group number of element X and explain your reasoning.

[4 Marks]

Automobile airbags inflate by the rapid decomposition of sodium azide:

\( 2NaN_3(s) \rightarrow 2Na(s) + 3N_2(g) \)

Calculate the mass of \( NaN_3 \) required to inflate a 60.0 dm³ airbag to a pressure of 110 kPa at 25°C.

[5 Marks]

The hydrogen emission spectrum consists of a series of lines requiring specific energy transitions.

Explain why the lines in the spectrum converge at high frequency.
State what the limit of this convergence represents.
Calculate the energy (in J) of the transition from n=4 to n=2, given Rydberg constant \( R_H = 2.18 \times 10^{-18} \text{ J} \).