DP Chemistry (last assessment 2024)

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Question 22N.1.hl.TZ0.20

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.hl.TZ0.20
Level hl Paper 1 Time zone TZ0
Command term Deduce Question number 20 Adapted from N/A
20.
[Maximum mark: 1]
22N.1.hl.TZ0.20

Data is given for the reaction 2X2 (g) + Y2 (g) → 2X2Y (g).

What rate equation can be inferred from the data?

A.  Rate = k [X2] [Y2]

B.  Rate = k [X2]2 [Y2]

C.  Rate = k [X2]2 [Y2]0

D.  Rate = k [X2]2 [Y2]2

[1]

Markscheme

C

Examiners report

Well over 80% of candidates were able to deduce the rate equation from the reaction rate data provided. The most common distractor (B) indicates that a few students confused zero and first order dependence for Y2.

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