Chemistry Form Six Pre-Mock 2026/2027 - Mwera High School
FORM SIX PRE MOCK CHEMISTRY 1 MWERA HIGH SCHOOL 2026
8.
(a) Account for the following:
(i) 2-pentanal and 2-methyl-2-propenone do not exist.
(ii) The boiling point of acetone is higher than that of
propanal.
(iii) There is no intermolecular hydrogen bonding between
the molecules carbonyl compounds.
(b) How would you bring about the following conversion:
(i) Propanal to propanone
(ii) Benzene to benzene carbaldehyde
(c) Phenols undergo electrophilic aromatic substitution
reaction to form ortho and para substituted products. Explain four (04) common
electrophilic aromatic substitution reactions of phenols.
(d) (i) What factors contribute to the acidic nature of
phenol? Basing on these factors, compare the acidity nature of phenol and
cyclohexane.
(ii) Benzene is less reactive than phenol towards
electrophilic aromatic substitution reactions
Explain.
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