Chemistry

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Past Questions

Year2023
Exam TypeWAEC
Question 1
waec 2023
a

40

b

120

c

65

d

30

Question 2
waec 2023
a

energy is released when liquids change to solids.

b

carbon atoms in gaseous methane are further apart than those in solid diamond.

c

there is large decrease in the volume of a solid metal when pressure is applied to it.

d

particles move faster in the gaseous state than in the liquid state.

Question 3
waec 2023
a

\(CH_3COOH + OH^- ⇌H^+⇌ CH_3COO^- + H_2O\)

b

\(CH_3COOH + C_2H_5OH ⇌H^+⇌ CH_3COOC_2H_5 + H_2O\)

c

\(CH_3COOC_2H_5 + H_2O ⇌H^+⇌ CH_3COO^- + CH_3CH_2OH\)

d

\(CH_3COOCH_2CH_3 + H_2O ⇌H^+⇌ CH_3COOH + CH_3CH_2OH\)

Question 4
waec 2023
a

experimentation

b

problem identification

c

Analysis

d

Open-mindedness

Question 5
waec 2023
a

the combustion of alkanes.

b

the cracking of hydrocarbons.

c

polymerization reactions.

d

addition of hydrogen to unsaturated vegetable oils.

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