DP Chemistry (first assessment 2025)

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Question 23M.2.HL.TZ2.16a

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.2.HL.TZ2.16a
Level HL Paper 2 Time zone TZ2
Command term Outline, State Question number a Adapted from N/A
a.
[Maximum mark: 2]
23M.2.HL.TZ2.16a
(a)

Combustion of coal emits particulates into the atmosphere.

(a.i)

Outline why this affects global warming.

[1]

Markscheme

reflects «sun» light ✓

 

Accept “results in global dimming”
OR
“reduces the amount of energy reaching the Earth”
OR
“acts as nucleation points for cloud formation”.

Do not accept answers that only indicate increases in global temperatures.

(a.ii)

State the major form of energy produced by the combustion of coal.

[1]

Markscheme

electrical/electricity ✓

 

Accept “heat/thermal”.