Post Utme Chemistry Past Questions and Answers

Question 711:

There is a large temperate interval between the melting point and the boiling point of a metal because ____________

A. Metals have very high melting points
B. Metal conduct heat very rapidly
C. Melting does not break the metallic bond but boiling does
D. The crystal lattice of metals is easily

Question 712:

Copper(II) tetraoxosulphate (IV) is widely used as a ____________

A. Fertilizer
B. Fungicide
C. Disinfectant
D. Purifier

Question 713:

Which of the following substances is not a homogeneous mixture?

A. Filtered sea water
B. Soft drink
C. Flood water
D. Writing ink

Question 714:

Ethene when passed into concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is rapidly absorbed. The product is diluted with water and then warmed to produce ____________

A. Ethanol
B. Diethyl ether
C. Ethanol
D. Dimethyl sulphate

Question 715:

A certain liquid has a high boiling point. It is viscous, nontoxic, miscible with water to be - hygroscopic. This liquid is most likely to be ____________

A. \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
B. \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OHCH}_{3}\)
C. \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHOHCH}_{3}\)
D. \(\mathrm{CH}_{3} \mathrm{OHCHOCH} \mathrm{OH}_{2}\)