Chemistry 1995 Jamb Past Questions and Answers

Question 1 :

• JAMB 1995

Chromatography is used to separate components of mixtures which differ in their rates of?

A. Diffusion
B. Migration
C. Reaction
D. Sedimentaion

Question 2 :

• JAMB 1995

Chromatography is used to separate components of mixtures which differ in their rates of?

A. Diffusion
B. Migration
C. Reaction
D. Sedimentaion

Question 3 :

• JAMB 1995

Which of the following is a example of a chemical change?

A. Dissoultion of salt in water
B. Rusting of iron
C. Melting of ice
D. Separating a mixture by distillation

Question 4 :

• JAMB 1995

The number of hydrogen ions in 4.9 g of tetraoxosulphate (IV) acid is?
(S = 32, O =16, H = 1, Na = 6.02 x 10₂₃

A. 3.01 x 10₂₂
B. 6.02 x 10₂₂
C. 3.01 x 10₂₃
D. 6.01 x 10₂₃

Question 5 :

• JAMB 1995

What volume of oxygen will remain after reacting 8cm³ of hydrogen with 20cm³ of oxygen?

A. 10 cm³
B. 12 cm³
C. 14 cm³
D. 16 cm³