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Chemistry Past Questions and Answers

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Chemistry Questions

Question 791:

Palm wine turns sour with time because?

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A The sugar content is converted into alcohol
B The carbon (IV) oxide formed during the fermentation process has a sour taste
C It is commonly adulterated by the tappers and sellers
D Microbial activity results in the production of orgain acids within it

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Question 792:

Catalytic hydrogenation of benzene produces?

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A An aromatic hydrocarbon
B Margarine
C Cyclohexane
D D.D.T

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Question 793:

Which of the following represents saponification?

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A Reaction of carboxylic acids with sodium hydroxide
B Reaction of alkanoates with acid
C Reaction of alkanoates with alcohols
D Reaction of alkanoates with sodium hydroxide

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Question 794:

The confirmatory test for alkanoic acids in organic qualitative analysis is the?

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A Turning of wet blue litmus paper red
B Reaction with alkanols to form esters
C Reaction with sodium hydroxide to form salt and water
D Reaction with aqueous Na<sub style='font-size: smaller;'>2</sub>COsp<sub style='font-size: smaller;'>3</sub> to liberate a gas which turns lime water milky

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Question 795:

A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?

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A Sulphur (ii) oxide
B Hydrogen sulphide
C Sulphide (lV) oxide
D Hydrogen chloride

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