9701 · topic questions

Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds

Chemistry4 questions

4 past-paper questions on Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds

9701/41 · May/June 20244 marks
Describe the trend in the solubility of the hydroxides of magnesium, calcium and strontium. Explain your answer.
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9701/42 · May/June 20253 marks
Describe the trend in the decomposition temperature of the Group 2 nitrates. Explain your answer.
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9701/41 · May/June 20242 marks
The trend in the decomposition temperatures of the Group 2 ethanedioates is similar to that of the Group 2 nitrates. Suggest…
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9701/41 · May/June 20252 marks
State which of CaCO3 and BaCO3 decomposes at a lower temperature. Explain your answer. The compound that decomposes at a lower…
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Worked example

What a lost mark actually looks like

This answer reaches the right coordinates and still drops a mark — the conclusion is stated, but never justified. Examiners pay for the reasoning, not the answer.

MARKED

80%

Strong

M1dy/dx = 3x^2 - 12x + 9M1 earned
M1(x - 1) $(x - 3) = 0$ M1 earned
A1 $x = 1$ or $x = 3$ A1 earned
B1(1, 5) is a maximum and (3, 1) is a minimumB1 not earned

B1 — withheld
You stated the nature of each point correctly, but stated it without justification. This mark needs the reasoning shown — either evaluate the second derivative (d²y/dx² = 6x − 12, giving −6 at $x = 1$ and +6 at $x = 3$ ) or show a sign change of dy/dx either side of each point. An unsupported assertion earns nothing here even when the conclusion is right.

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How many Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds questions are there for 9701?: This page collects 4 recent Cambridge Chemistry (9701) past-paper questions tagged to Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds. Each links straight to instant marking against the official 9701 scheme.
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