Dialysis is used for people with defective kidneys. It involves the process of:
- (A) Adsorption
- (B) Osmosis
- (C) Electrophoresis
- (D) Diffusion
- (B) Osmosis
Which toxic gas in the environment lowers the resistance to pneumonia in human beings?
- (A) Nitrogen dioxide
- (B) Sulfur dioxide
- (C) Nitrogen dioxide
- (D) Carbon dioxide
- (B) Sulfur dioxide
The process of smelting and cooling converts pig iron into:
- (A) Silicon steel
- (B) Steel
- (C) Cast iron
- (D) Wrought iron
- (C) Cast iron
Which of the following is a CORRECT statement?
- (A) Butter is a super cooled oil
- (B) Butter is an emulsion
- (C) Butter is a molecular solid
- (D) Butter is the highly melt liquid
- (B) Butter is an emulsion
Pure iron is obtained in the blast furnace by the reduction of:
- (A) Hematite
- (B) Magnetite
- (C) Limonite
- (D) Iron oxide
- (D) Iron oxide
During the space journeys rockets use:
- (A) Liquid carbon
- (B) Liquid ammonia
- (C) Liquid oxygen
- (D) Liquid hydrogen
- (C) Liquid oxygen
The chemical used as a fixer in photography is:
- (A) Sodium
- (B) Borax
- (C) Sodium thiosulfate
- (D) Potassium sulfate
- (C) Sodium thiosulfate
“Ruby” is a crystallized:
- (A) Lead
- (B) Carbon
- (C) Diamond
- (D) Sapphire
- (D) Sapphire
Which of the following metals catches fire when thrown in water?
- (A) Sodium
- (B) Cesium
- (C) Indium
- (D) Potassium
- (A) Sodium
When a bottle of perfume is kept in a corner of the room, its fragrance is felt all the corners. This happens due to:
- (A) Sublimation
- (B) Vaporization
- (C) Diffusion
- (D) Evaporation
- (C) Diffusion
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