Chemistry · May / June 2024 · Paper 62 · Question 1
0620
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The question as text
When a mixture of calcium hydroxide and ammonium chloride is heated, ammonia gas is made. calcium hydroxide + ammonium chloride calcium chloride + water + ammonia Ammonia gas is soluble in water and toxic. Ammonia gas reacts with hot copper(II) oxide to make nitrogen. ammonia + copper(II) oxide copper + water + nitrogen A student makes nitrogen using the apparatus shown in Fig. 1.1. water nitrogen B copper(II) oxide X A calcium hydroxide and ammonium chloride Fig. 1.1
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1(a)[2]
A boiling tube / test-tube
B measuring cylinder
1(b)[2]
one arrow in each region shown
1(c)[1]
water / H2O
1(d)[1]
ammonia dissolves in the water
1(e)[1]
it is air
1(f)[1]
ammonia is toxic / poisonous
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