Jamb Chemistry Past Questions and Answers

Question 1996:

• JAMB 2018

The salt that reacts with dilute hydrochloric acid to produce a pungent smelling gas which decolourizes acidified purple potassium tetraoxomanganate (VII) solution is

A. Na\(_2\)SO\(_4\)
B. Na\(_2\)SO\(_3\)
C. Na\(_2\)S
D. Na\(_2\)CO\(_3\)

Question 1997:

• JAMB 2018

The refreshing and characteristic taste of soda water and other soft drinks is as a result of the presence of

A. Carbon(IV)oxide
B. Carbon(ll)oxide
C. Soda
D. Glucose

Question 1998:

• JAMB 2018

Which of the following are mixtures?
I. Petroleum
II. Rubber latex
III. Vulcanizer's solution
IV. Carbon sulphide

A. I, II and III
B. I, II and IV
C. I and II only
D. I and IV

Question 1999:

• JAMB 2018

A balanced chemical equation obeys the law of

A. Conservation of mass
B. Definite proportions
C. Multiple proportions
D. Conservation of energy

Question 2000:

• JAMB 2018

When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;

A. Nitrogen and carbondioxide
B. The rare gases
C. Nitrogen and oxygen
D. Nitrogen and the rare gases