DP Chemistry (first assessment 2025)

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Question SPM.1A.SL.TZ0.2

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.SL.TZ0.2
Level SL Paper 1A Time zone TZ0
Command term Question number 2 Adapted from N/A
2.
[Maximum mark: 1]
SPM.1A.SL.TZ0.2

Ice containing only the isotope 2H sinks and does not melt when dropped into ordinary distilled water maintained at 3 °C.


Which statement is correct?


A.  The isotope 2H has a high natural abundance.

B.  2H2O (s) has a higher melting point than normal ice.

C.  2H2O (s) has a lower density than normal ice-cold water.

D.  2H2O has different chemical properties from normal water.

[1]

Markscheme

B