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JAMB 2010 Chemistry Past Questions & Answers (UTME Practice)

Creado por: juanbacan
Free JAMB 2010 Chemistry past questions with answers and clear explanations. Practice online, track your score, and prepare faster for the UTME.Sin descripción disponible.
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Question 11

A noble gas with high fog-penetrating power used in aerodrome beacons is

A)

Neon

B)

Argon

C)

Krypton

D)

Helium

How to solve?

Question 12

Permanent hardness of water can be removed by

A)

boiling

B)

filtration

C)

adding slaked lime

D)

adding caustic soda

How to solve?

Question 13

Substances used as drying agents are usually

A)

amphoteric

B)

acidic

C)

efflorescent

D)

hygroscopic

How to solve?

Question 14

Calculate the solubility (mol dm−3) of 40 g of CuSO4 dissolved in 100 g of water at 120 °C. [Cu = 64, S = 32, O = 16]

A)

0.25

B)

2.50

C)

4.00

D)

0.40

How to solve?

Question 15

Coffee stains can best be removed by

A)

kerosene

B)

carbon tetrachloride

C)

a solution of borax in water

D)

turpentine

How to solve?

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