Jamb Chemistry 1994 Past Questions and Answers

Question 46:

• JAMB 1994

The IUPAC name of the compound above is

A. 2,2-dimethyl but -1-yne
B. 2,2-dmethyl but -1-ene
C. 3,3-dimethyl but -1-ene
D. 3,3-dimethyl but-1-yne

Question 47:

• JAMB 1994

Use the diagram above to answer this question. The reaction taking place in flask G is known as

A. Hydrolysis
B. Double decomposition
C. Dehydration
D. Pyrolysis

Question 48:

• JAMB 1994

MnO4(aq) + 8H + 5Fe2+ \(\to\) Mn2+(aq) + 5Fe3+(aq) + H2O. The oxidation number of maganese in the above reaction changed from

A. +7 to +2
B. +6 to +2
C. +5 to +2
D. +4 to +2

Question 49:

• JAMB 1994

which of these metals CANNOT replace hydrogen from alkaline solutions?

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

Question 50:

• JAMB 1994

Clothes should be properly rinsed with water after bleaching because

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