Chemistry · May / June 2026 · Paper 41 · Question 6
0620
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This question is about metallic compounds.
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6(a)(i)[1]
amphoteric(oxides)
6(a)(ii)[1]
Na2ZnO2
6(a)(iii)[2]
ZnO + H2SO4 → ZnSO4 + H2O
M1 ZnSO4(1)
M2 equation correct(1)
6(a)(iv)[2]
Ba2+(aq) + SO42–(aq) → BaSO4(s)
M1 correct ionic equation(1)
M2 state symbols(1)
6(a)(v)[1]
white
6(b)(i)[3]
M1 0.04(1)
M2 0.02(1)
M3 3.04 (1)
6(b)(ii)[2]
M1 oxidation number of chromium / oxidation number of Cr(1)
M2 oxidation number = + 6(1)
6(b)(iii)[1]
Cr / chromium
6(c)[3]
M1 decreases(1)
M2 decreases(1)
M3 no change(1)
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