JAMB and WAEC Chemistry questions: Metals and their compounds

47 questions with answers and explanations. Tap an option to check yourself.

1. Question 41· Metals and their compounds· WAEC

   Aluminium is extracted by

   • Adisplacement by copper
   • Breduction with carbon
   • Cheating alone
   • Delectrolysis of molten alumina in cryolite

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   Explanation and discussion

2. Question 42· Metals and their compounds· JAMB

   Which metal reacts violently with cold water?

   • Apotassium
   • Bcopper
   • Ciron
   • Dzinc

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   Explanation and discussion

3. Question 43· Metals and their compounds· JAMB

   Copper is widely used for electrical wiring because it

   • Ais a good conductor and can be drawn into wires
   • Bis cheap and brittle
   • Cis magnetic
   • Ddoes not conduct heat

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4. Question 44· Metals and their compounds· WAEC

   Aluminium is extracted from

   • Ahaematite
   • Bcassiterite
   • Cgalena
   • Dbauxite

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   Explanation and discussion

5. Question 45· Metals and their compounds· WAEC

   Aluminium does not corrode easily because it

   • Ais covered by a thin protective oxide layer
   • Bis unreactive
   • Chas a low density
   • Dis a non-metal

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6. Question 46· Metals and their compounds· WAEC

   The rusting of iron requires both

   • Aheat and light
   • Boxygen and nitrogen
   • Cwater and carbon dioxide
   • Dwater and oxygen

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   Explanation and discussion

7. Question 47· Metals and their compounds· WAEC

   Copper is used for electrical wiring because it

   • Ais very hard
   • Bis a good conductor and can be drawn into wires
   • Cdoes not conduct heat
   • Dis magnetic

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   Explanation and discussion