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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 346:

If a solid has a low melting point and dissolves readily in benzene, it would probably

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A Contain strong electrostatic forces of attraction
B Conduct electricity in the molten state
C Dissolve in water
D Have covalent bonding
E Absorb moisture on exposure to air

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Question 347:

Which of the following molecules is linear in shape?

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A CH₄
B H₂O
C NH₃
D H₂S
E CI₂

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Question 348:

Which of the following cannot be deduced from the electronic configuration of a transition metal?

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A Possession of magnetic property
B Ability to form complex ions
C Position in the Periodic Table
D Variable oxidation states
E Physical properties of the metal

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Question 349:

What is the percentage by mass of copper in copper in copper (l) oxide (CU₂O)? [O = 16; CU =64]

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A 88.9%
B 80.0%
C 66.7%
D 20.0%
E 11.1%

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Question 350:

A WEAK ACID IS ONE WHICH

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A IS NOT CORROSIVE
B IS SLIGHTLY IONIZIED IN WATER
C DOES NOT PRODUCE SALTS WITH ALKALIS
D DOES NOT CONDUCT AN ELECTRIC CURRENT IN AQUEOUS SOLUTION
E FORMS ACID SALTS WITH BASES

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