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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 1411:

Which of the following gases is not acidic?

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A \(SO_{3}\)
B \(NO_{2}\)
C \(Co_{2}\)
D CO

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Question 1412:

A hydrocarbon contained 14.3% hydrogen. The empirical formula for the hydrocarbon is [H= 1.0, C= 12.0]

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A \(CH\)
B \(CH_{2}\)
C \(CH_{3}\)
D \(CH_{4}\)

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Question 1413:

Which of the following statements is NOT a chemical property of an acid?

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A Evolution of ammonia when heated with ammonium salts
B Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt
C Formation of salt and water with alkalis
D Formation of salt and hydrogen gas with reactive metals

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Question 1414:

Halogens generally react with metals to form

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A Alkalis
B Acids
C Bases
D Salts

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Question 1415:

Potassium Chloride solid does not conduct electricity because

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A It is a covalent compound
B Strong cohesive forces make its ions immobile
C Strong cohesive force makes its molecule immobile
D Each of potassium and chlorine structures contain noble gas structure

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