Post Utme Chemistry Past Questions and Answers

Question 311:

Which of the following methods cannot be used to remove permanent hardness from water?

A. Adding of washing soda
B. Addition of caustic soda
C. Perutit method
D. Adding alum to water

Question 312:

If the solubility or sodium tetraoxosulphate (IV) at 30°c is 18g per 100g How much is this gram per kilogram?

A. 18g per 100g
B. 180g per 100g
C. 180g per 1000g
D. 180g per mg

Question 313:

The following are example of colloid except ____________

A. Milk
B. Starch in water
C. Aerosol
D. Ammonium chloride solution

Question 314:

The pH of the solution M, N, O, and P are 4, 6, 8 and 10 respectively. Therefore ____________

A. None of the solution is acidic
B. The pH of the O made neutral by adding water
C. The most acidic solution is P
D. Mis the most acidic solution

Question 315:

Sodium chloride may be obtained from brine by ____________

A. Detection
B. Distillation
C. Evaporation
D. Sublimation