Chemistry 1993 Jamb Past Questions and Answers

Question 46 :

• JAMB 1993

The IUPAC nomenclature for the compound above is

A. Dimethlhexane
B. 3,5 dimethylhexane
C. 1.1 dmethyl, 3 methylpentane
D. 2.4 dimethylhexane

Question 47 :

• JAMB 1993

The function of the copper (ll)tetraoxosulphate (IV) in dilute H₂SO₄ in the figure above is to

A. Dry the gas
B. Absorb phosphine impurity
C. Absorb ethene impurity
D. From an acetylide with ethyne

Question 48 :

• JAMB 1993

The dissolution of common salt in water is a physical change because

A. The salt can be obtained by crystallization
B. The salt can be recovered by the evaporation of water
C. Heat is not generated during mixing
D. The solution will not boil at 100^oC

Question 49 :

• JAMB 1993

At 25^oC and 1atm, a gas occupies a volume of 1.50dm³. What volume will it occupy at 100^oC and 1atm?

A. 1.88 dm³
B. 6.00 dm³
C. 18.80 dm³
D. 18.80 dm³
E. 60.00dm³