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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:

The difference between colloides and and suspensions is brought out clearly by the fact that while colloids?

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A Do not scatter light, suspensions do
B Can be separated by filtration, suspension cannot be so separated
C Can be separated by a membrane, suspensions cannot
D Do not settle out on standing, suspensions do

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Question 17:

In general, an increase in temperature increases the solubility of a solute in water because?

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A More solute molecules collide with each other
B Most solutes dissolve with the evoltion of heat
C More solute molecules dissociate at hihger temperatures
D Most solutes dissolve with absorption of heat

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Question 18:

Neutralization involves a reaction between H₃O⁺ and?

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A CI^-
B OH^-
C NO₃^-
D CO₃^2-

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Question 19:

In the process of silver-plating a metal M, the metal M is the?

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A Anode and a direct current is used
B Cathode and an alternating current is used
C Anode and an alternating current is used
D Cathode and a direct current is used

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Question 20:

How many moles of copper would be deposited by passing 3F of electricity through a solution of copper (II) tetraoxosulpohate (IV)?
(F = 96 500 C mol^-)

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A 0.5
B 1.0
C 1.5
D 3.0

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