Post Utme Chemistry Past Questions and Answers

Question 211:

Ethanol reacts with aqueous Sodium oxoiodate(I) to give a bright yellow solid with a characteristic smell. The product is ____________

A. Trichloromethane
B. Triiodornethane
C. Iodoethane
D. Ethanol

Question 212:

Plastics which lose their plasticity on being subjected to heat are said to be ____________

A. Biodegradable
B. Polymeric
C. Thermosets
D. Thermoplastics

Question 213:

A mixture of sand, ammonium chloride and sodium chloride is ____________

A. Sublimation followed by addition of water and filtration
B. Sublimation followed by addition of water and evaporation
C. Addition of water followed by filtration and sublimation
D. Addition of water followed by crystallization and sublimation

Question 214:

Which of the following elements is common to bronze and soft solder?

A. Tin
B. Lead
C. Copper
D. Zinc

Question 215:

A solution of calcium bromide contains 20g/dm3. What is the molar concentration of calcium bromide relative to bromide ions? [Ca =40, Br= 80]

A. 0.1.0.1
B. 0.1, 0.2
C. 0.1. 0.05
D. 0.05, 0.1