DP Chemistry (last assessment 2024)

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Question 18M.1.sl.TZ1.16

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.sl.TZ1.16
Level sl Paper 1 Time zone TZ1
Command term Determine Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
18M.1.sl.TZ1.16

Which change increases the rate of formation of hydrogen when zinc reacts with excess hydrochloric acid, assuming all other conditions remain the same?

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

A.     Adding water to the hydrochloric acid

B.     Decreasing the temperature

C.     Increasing the volume of hydrochloric acid

D.     Decreasing the size of the zinc particles while keeping the total mass of zinc the same

[1]

Markscheme

D

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