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JAMB Chemistry 2013 Past Questions: Practice Test with Answers

Creado por: juanbacan
Free JAMB Chemistry 2013 past-questions practice test with answers and clear explanations. Topics include stoichiometry, gas laws, organic reactions, electrochemistry and equilibrium.Sin descripción disponible.
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Question 11

The constituent of air that acts as a diluent is

A)

Nitrogen

B)

Carbon(IV) oxide

C)

Noble gases

D)

Oxygen

How to solve?

Question 12

Steam changes the colour of anhydrous cobalt(II) chloride from

A)

White to red

B)

Blue to white

C)

Blue to pink

D)

White to blue

How to solve?

Question 13

An example of a hygroscopic substance is

A)

CuO(s)

B)

MgCl2(s)

C)

CaCl2(s)

D)

NaOH(s)

How to solve?

Question 14

If 24.4 g of lead(II) trioxonitrate(V) were dissolved in 42 g of distilled water at 20 °C, calculate the solubility of the solute in g dm−3.

A)

581.000

B)

0.581

C)

5.810

D)

58.100

How to solve?

Question 15

The solvent used for removing grease stain is

A)

Turpentine

B)

Ammonia solution

C)

Ethanol

D)

Solution of borax in water

How to solve?

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