DP Chemistry (first assessment 2025)

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Question 21M.1A.SL.TZ1.17

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.1A.SL.TZ1.17
Level	SL	Paper	1A	Time zone	TZ1
Command term	State	Question number	17	Adapted from	N/A

17.

[Maximum mark: 1]

21M.1A.SL.TZ1.17

Which substance has the highest lattice enthalpy?

A. $KCl$

B. ${CaCl}_{2}$

C. $KF$

D. ${CaF}_{2}$

[1]

Markscheme

D

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.1—The ionic model » Structure 2.1.3—Ionic compounds exist as three-dimensional lattice structures, represented by empirical formulas. Explain the physical properties of ionic compounds to include volatility, electrical conductivity and solubility.