, 3
4 Magnesium oxide reacts with dilute hydrochloric acid.
What is correct for this reaction?
A A gas is given off.
B A green solution of a salt is formed.
C It is a neutralisation.
D Magnesium hydrochloride is formed.
Your answer [1]
5 This question is about the relationship between enthalpy changes and bonds broken and made.
Which row is correct?
sign of ΔH description bonds broken and made
more energy released in
A – endothermic making bonds than used
in breaking bonds
less energy released in
B – exothermic making bonds than used
in breaking bonds
less energy released in
C + endothermic making bonds than used
in breaking bonds
more energy released in
D + exothermic making bonds than used
in breaking bonds
Your answer [1]
6 What are possible products from cracking an alkane molecule?
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