Question : Dry ice is
Option 1: Solid ammonia
Option 2: Solid sulphur dioxide
Option 3: Dry carbon dioxide
Option 4: Solid carbon dioxide
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Correct Answer: Solid carbon dioxide
Solution : The correct answer is Solid carbon dioxide.
Solid carbon dioxide is known as dry ice. It is used to preserve at very low temperatures and preserving materials without moisture or presence of water. It also increases the shelf life of the products. It is widely used in pharmaceutical industry to transport cavvines, blood samples, and other sensitive materials that require low temperatures.
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Question : What is another name for frozen carbon dioxide?
Option 1: Refrigerant
Option 2: Coal
Option 3: Dry ice
Option 4: Coke
Question : Oxides of _____ and _____ dissolve in rainwater and form an acid called acid rain.
Option 1: Phosphorous, Sulphur
Option 2: Sulphur, Nitrogen
Option 3: Carbon dioxide, Methane
Option 4: Calcium, Magnesium
Question : Silicon is a:
Option 1: semiconductor
Option 2: insulator
Option 3: non-conductor
Option 4: carbon dioxide
Question : Which one out of the following helps in burning?
Option 1: Oxygen
Option 2: Carbon monoxide
Option 3: Nitrogen
Option 4: Carbon dioxide
Question : The chief source for the production of nitrogenous fertilizers is:
Option 1: Ammonia
Option 2: Nitric acid
Option 4: Nitrogen dioxide
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