Jamb Chemistry 1994 Past Questions and Answers

Question 26:

• JAMB 1994

Which of the following is TRUE of Le Chatelier's Principle for an exothermic reaction?

A. Increase in temperature will cause an increase in the equilibrium constant
B. Increase in temperature will cause a decrease in the equilibrium constant
C. Addition of a catalyst will cause an increase in the equilibrium constant
D. Addition of a catalyst will cause a decrease in the equilibrium constant

Question 27:

• JAMB 1994

Which of the following are produced when ammonium trioxonitrate (V) crystals are cautiously heated in a hard glass round bottomed flask?

A. N₂O and steam
B. NO₂ and ammonia
C. N₂O₂ and NO₂
D. NO and NO₂

Question 28:

• JAMB 1994

Which of these metals CANNOT replace hydrogen from alkaline solutions?

A. Alulinium
B. Zinc
C. Tin
D. Iron

Question 29:

• JAMB 1994

Clothes should be properly rinsed with water after bleaching because?

A. The bleach decolourizes the cothes
B. Chlorine reacts with fabrics during bleaching
C. The clothes are sterilized during bleaching
D. Hydrogen chloride solution is produced during bleaching

Question 30:

• JAMB 1994

Which of these solutions will give a white precipitate with a solution of barium chloride acidified with hydrochloric acid?

A. Sodium trioxocarbonate (IV)
B. Sodium tetraoxosulphate (IV)
C. Sodium trioxosulphate (IV)
D. Sodium sulphide