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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 16:

Coffee stains can best be removed by

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A Kerosine
B Turpentine
C A solution of borax in water
D Ammonia solution

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Question 17:

Carbon (II) oxide is considered dangerous if inhaled mainly because it

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A Can cause injury to the nervous system
B Competes with oxygen in the blood
C Competes with carbon (IV) oxide in the blood
D Can cause lung cancer

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Question 18:

The acid that is used to remove rust is

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A Boric
B Hydrochloric
C Trioxonitrate (V)
D Tetraoxosulphate (VI)

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Question 19:

Calculate the volume of 0.5 mol dm^-3 H₂So₄ that is neutralized by 25 cm³ of 0.1 mol dm^-3 NaOH

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A 5.0 cm³
B 2.5 cm³
C 0.4 cm³
D 0.1 cm³

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Question 20:

The colour of methyl orange in alkaline medium is

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A Yellow
B Pink
C Orange
D Red

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