Waec 2021 Chemistry Question 4

Practice essay / theory question 4 from the 2021 Waec Chemistry examination. This question covers General .

Waec 2021 Chemistry Essay / Theory
Topic: General
Question 4 WAEC • 2021 • CHEMISTRY • essay

Question Parts

( a )
(i) What is the structure of (I) graphite (II) diamond?
( a )
(ii) Explain briefly why diamond is hard and a non-conductor of electricity while graphite is soft and an electrical conductor.
( b )
(i) State what is achieved at each of the following stages in the purification of town water supply: (I) aeration; (II) screening; (III) sedimentation.
( b )
(ii) Name two substances responsible for hardness in water.
( b )
(iii) State two methods for the removal of hardness in water.
( b )
(iv) Give one disadvantage of hard water.
( c )
(i) Describe briefly the extraction of tin from its ore.
( c )
(ii) Write a balanced chemical equation for the reaction.
( c )
(iii) Write an equation for the reaction of tin with: (I) oxygen, (II) chlorine.

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About This Question

This is Waec 2021 Chemistry Question 4. It is one of the essay questions from the 2021 Waec Chemistry examination.

The question covers General .

View More Waec 2021 Chemistry Questions More Waec Practice Questions Back to Questions

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