Chemistry · Oct / Nov 2020 · Paper 62 · Question 3
0620
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Solid Q and solid R were analysed. Solid Q was zinc carbonate. Tests were done on each solid. tests on solid Q Complete the expected observations. 3
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3(a)[3]
fizzing / effervescence / bubbles
(some of the) solid dissolves / disappears OR colourless solution
limewater turns milky
3(b)[1]
carbon dioxide / CO2
3(c)(i)[2]
white precipitate
dissolves / forms a colourless solution
3(c)(ii)[1]
aluminium (ions) give the same result
3(c)(iii)[1]
add (excess) ammonia (solution)
3(d)[2]
Tests on solid R
sodium / Na+
iodide / I–
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