Chemistry · May / June 2022 · Paper 41 · Question 6
0620
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This question is about zinc and its compounds.i
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6(a)(i)[1]
zinc blende
6(a)(ii)[1]
heat( zinc sulfide) strongly in air / roast in air
6(a)(iii)[1]
carbon or carbon monoxide
6(a)(iv)[1]
the temperature in the furnace is above or higher than the boiling point of zinc
OR
the boiling point of zinc is below or less than the temperature of the furnace
6(a)(v)[1]
condensation / condensing / condense
6(b)(i)[1]
no bubbles
or
no fizzing
or
no effervescence
6(b)(ii)[1]
zinc / zinc oxide / zinc hydroxide
6(b)(iii)[2]
(powder has) larger surface area OR lumps have smaller surface area (1)
(powder has) more collisions per unit time / more collision frequency
OR
lumps have fewer collisions per unit time / less collision frequency (1)
6(b)(iv)[1]
crystals (form on glass rod or microscope slide)
6(b)(v)[1]
ZnSO4
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