Question : Dry powder fire extinguishers contain:
Option 1: sand
Option 2: sand and sodium carbonate
Option 3: sand and potassium carbonate
Option 4: sand and sodium bicarbonate
Correct Answer: sand and sodium bicarbonate
Solution : The correct answer is sand and sodium bicarbonate.
Fire extinguishers are used to control the fire. The main exponents of fire are fuel, oxygen, and chemical reactions, and fire extinguishers are used to eliminate the elements that are required for the fire. A mixture of sand and sodium bicarbonate is used in the dry powder fire extinguishers.
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Question : Saltpetre is another name for ______.
Option 1: sodium chloride
Option 2: potassium nitrate
Option 3: potassium chloride
Option 4: sodium hydroxide
Question : Which of the following has the chemical name sodium hydrogen carbonate?
Option 1: Baking powder
Option 2: Baking soda
Option 3: Washing soda
Option 4: Plaster of Paris
Question : Among the given elements, which comes first in the periodic table of elements?
Option 1: Neon
Option 2: Sodium
Option 3: Silicon
Option 4: Potassium
Question : Which one of the following metals does not react with water to produce Hydrogen?
Option 1: Potassium
Option 2: Cadmium
Option 3: Sodium
Option 4: Lithium
Question : During dehydration what is the substance that is usually lost by the body ?
Option 1: Sugar
Option 2: Sodium chloride
Option 3: Calcium phosphate
Option 4: Potassium chloride
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