A certain liquid dissolves copper (II) sulphate to form blue solution. This is likely to be A. Hydrochloric acid

B. Liquefied oxygen
C. Water
D. Nitric acid.
viii. Classification of fuels based on the state include......................
A. Soli, gaseous and molten fuels B. Solid, gaseous and liquid fuels
C. Solid, frozen and liquid fuels
D. Solid, gaseous and steam fuels
ix. The process of chlorination in water treatment aims at:-
A. Making syrup
B. Removing bad odor C. Killing micro-organism D. Forming suspension
x. Addition of potash or Aluminum alum during urban water treatment is purposely for A. Killing germs
B. Identifying impurities present in water
C. Coagulating solid particles
D. Improving taste of water

1 answer

Let's address each question one by one:

vii. A certain liquid dissolves copper (II) sulphate to form a blue solution. This is likely to be: C. Water
Copper (II) sulfate dissolves in water to form a blue solution.

viii. Classification of fuels based on the state includes: B. Solid, gaseous and liquid fuels
Fuels can be classified into three main states: solid (e.g., coal), liquid (e.g., petrol), and gas (e.g., natural gas).

ix. The process of chlorination in water treatment aims at: C. Killing micro-organism
Chlorination is primarily used to disinfect water by killing harmful microorganisms.

x. Addition of potash or Aluminum alum during urban water treatment is purposely for: C. Coagulating solid particles
Aluminum alum acts as a coagulant, helping to clump together suspended particles in water to facilitate their removal.

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