Post Utme Chemistry Past Questions and Answers

Question 151:

What is the IUPAC name of the hydrocarbon?
[image]

A. 2-ethy1-4-methyl pent-2-ene
B. 3,5 dimethyl hex-3-ene
C. 2,4 -dimethyl hex-3-ene
D. 3-methyl 2 -ethyl hex-2-ene

Question 152:

Which of the following is NOT a monomer?
[image]

A. [image]
B. \(\mathrm{CH}_{2}=\mathrm{CH}_{2}\)
C. \(\mathrm{CH}_{2}=\mathrm{CHCl}\)
D. [image]

Question 153:

Which of the following behaves like ethyne?

A. \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{3}\)
B. \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}_{2}\)
C. \(\mathrm{CH}_{2}=\mathrm{CH}_{2}\)
D. \(\mathrm{CH}_{3} \mathrm{CH}_{3}\)

Question 154:

A mixture of iron and sulphur can be separated. by dissolving the mixture in ____________

A. Steam
B. Dilute hydrochloric acid
C. Dilute sodium hydroxide
D. Benzene

Question 155:

If \(67.5 \mathrm{~g}\) of oxide of lead was reduced to \(61.2 \mathrm{~g}\) of metal, calculate the formula of the oxide. \((\mathrm{Pb}=207,0=16)\)

A. \(\mathrm{PbO}\)
B. \(\mathrm{PbO}_{3}\)
C. \(\mathrm{Pb}_{3} \mathrm{O}_{4}\)
D. \(\mathrm{Pb}_{2} \mathrm{O}_{3}\)