Chemistry Past Questions and Answers

The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are

A Hydrogen and oxygen gases
B Water and hydrogen gas
C Water and sodium metal
D Sodium metal and oxygen gas

Question 1172:

The solubility of a salt of molar mass 101g at 20^oC is 0.34 mol dm^-3. If 3.40g of the salt is dissolved completely in 250cm³ of water in a beaker, the resulting solution is

A A suspension
B Saturated
C Unsaturated
D Supersaturated

Question 1173:

Tetraoxosulphate (VI) acid burns the skin by

A Hydrolysis
B Hydration
C Heating
D Dehydration

Question 1174:

When a salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

A Efflorescence
B Deliquescence
C Effervescence
D Fluorescence

Question 1175:

Three drops of a 1.0 mol dm^-3 solution of NaOH are added to 20 cm³ of a solution of pH 8.4. The pH of the resulting solution will be

A Close to that of pure water
B Unaltered
C Greater than 8.4
D Less than 8.4