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Chemistry Past Questions and Answers

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Chemistry Questions

Question 606:

Mortar is NOT used for under-water construction because

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A It hardens by lose of water
B Its hardening doe not depend upon evaporation
C It requires concrete to harden
D It will be washed away by the flow of water

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Question 607:

Which of the following is NOT involved in the extraction of metals from their ores?

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A Reduction with carbon
B Reduction with other metals
C Reduction by electrolysis
D Oxidation with oxidizing agents

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Question 608:

When excess chlorine is mixed with ethene at room temperature, the product is

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A 1,2 - dichloroethane
B 1,2 - dichloroethene
C 1,1 - dichloroethane
D 1, 1 - dichloroethene

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Question 609:

Vulcanization of rubber is a process by which

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A Isoprene units are joined to produce rubber
B Rubber latex is coagulated
C Sulphur is chemically combined in the rubber
D Water is removed from the rubber

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Question 610:

The reaction between ethanoic acid and sodium hydroxide is an example of

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A Esterification
B Neutralization
C Hydroxylation
D Hydrolysis

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