1(v)
Four reactions are shown below in the diagram:
Which reactions produce water?
- (a)1 and 2
- (b)1 and 3
- (c)3 and 4
- (d)2 and 3
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3 and 4
Reason — Reaction 3 shows burning of ethanol, which is an example of combustion and combustion produces water and carbon dioxide. Reaction 4 has dilute sulphuric acid and magnesium carbonate, a reaction of acid and carbonate produces salt, water and carbon dioxide. Hence, reaction 3 and reaction 4 produces water.