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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 321:

What is the molar of hydrogen sulphide gas in the reaction H₂SO_4(aq) + 3H₂S_(g) â†’ 4S_(s) + 4H₂O _(l)n represented by the following equation?

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A Reducing agent
B A bleaching agent
C A dehydrating agent
D A sulphonating agent
E An oxidizing agent

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Question 322:

Alkanols have unexpectedly high boiling points relative to their molar masses because of intermolecular

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A Hydrogen bonding
B Metallic bonding
C Covalent bonding
D Ionic bonding
E Van der Waals' forces

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Question 323:

Sodium chloride is used in the following processes except in the

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A Treatment of polluted water
B Preservation of food
C Separation of soap from glycerol
D Manufacture of chlorine
E Manufacture of caustic soda

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Question 324:

The gaseous product formed when ammonia is passed over heated copper (ll) oxide is

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A Oxygen
B Nitrogen
C Hydrogen
D Nitrogen (l) oxide
E Nitrogen (ll) oxide

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Question 325:

Which of the following is not a halogen?

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A Silicon
B Fluorine
C Astatine
D Bromine
E Lodine

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