What are soaps?
- (A) Esters of heavy fatty acids
- (B) Salts of silicates
- (C) Sodium or potassium salts of fatty acids
- (D) Mixture of alcohol and glycerol
- (C) Sodium or potassium salts of fatty acids
Which of the following is used as laboratory solvent?
- (A) Kerosene oil
- (B) Diesel oil
- (C) Fuel oil
- (D) Petroleum oil
- (D) Petroleum oil
Kerosene oil is an example of:
- (A) Vegetable oil
- (B) Mineral oil
- (C) Essential oil
- (D) Natural oil
- (B) Mineral oil
Which of the following glasses is used in bullet proof screens?
- (A) Jena glass
- (B) Soda glass
- (C) Reinforced glass
- (D) Pyrite glass
- (C) Reinforced glass
Glass is made of the mixture of:
- (A) Rubber and salt
- (B) Sand and silicates
- (C) Plastic and quartz
- (D) Sugar and silicates
- (B) Sand and silicates
Potassium Permanganate is used for purifying drinking water because:
- (A) It is a sterilizing agent
- (B) It is a reducing agent
- (C) It is an oxidizing agent
- (D) It is a dissolving agent
- (C) It is an oxidizing agent
Which metal pollute the air of a big city?
- (A) Copper
- (B) Chromium
- (C) Lead
- (D) Cadmium
- (C) Lead
Which of the following is the source of common salt?
- (A) Pyrite
- (B) Halite
- (C) Calcite
- (D) Bauxite
- (B) Halite
Nuclear energy is obtained from:
- (A) Plutonium
- (B) Silicon
- (C) Thorium
- (D) Uranium
- (D) Uranium
Peroxyacetyl nitrate is a/an:
- (A) Acidic dye
- (B) Vitamin
- (C) Plant hormone
- (D) Secondary pollutant
- (D) Secondary pollutant
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