Jamb Chemistry 2010 Past Questions and Answers

Question 16:

• JAMB 2010

Coffee stains can best be removed by

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

Question 17:

• JAMB 2010

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

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

Question 18:

• JAMB 2010

The acid that is used to remove rust is

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

Question 19:

• JAMB 2010

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

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

Question 20:

• JAMB 2010

The colour of methyl orange in alkaline medium is

A. Yellow
B. Pink
C. Orange
D. Red