DP Chemistry (last assessment 2024)

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Question 18M.2.sl.TZ1.3a.i

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.sl.TZ1.3a.i
Level sl Paper 2 Time zone TZ1
Command term State Question number a.i Adapted from N/A
a.i.
[Maximum mark: 2]
18M.2.sl.TZ1.3a.i

This question is about ethene, C2H4, and ethyne, C2H2.

(a.i)

Ethyne, like ethene, undergoes hydrogenation to form ethane. State the conditions required.

[2]

Markscheme

nickel/Ni «catalyst»

 

high pressure

OR

heat

 

Accept these other catalysts: Pt, Pd, Ir, Rh, Co, Ti.

Accept “high temperature” or a stated temperature such as “150 °C”.

[2 marks]

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