DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ1.17

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ1.17
Level hl Paper 1 Time zone TZ1
Command term Predict Question number 17 Adapted from N/A
17.
[Maximum mark: 1]
22M.1.hl.TZ1.17

In which reaction does entropy decrease?

A.  NaCl (s) → NaCl (aq)

B.  Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)

C.  NH3 (g) + HCl (g) → NH4Cl (s)

D.  CuCO3 (s) → CuO (s) + CO2 (g)

[1]

Markscheme

C

Examiners report

Second best answered question in the exam with 85% of candidates identifying the correct answering for reaction in which entropy decreases.

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