Chemistry
Grade-8
Easy
Question
Carbon dioxide dissolves in water to give___
-
-
- HCOOH
-
Hint:
It dissolves to give a carbonic acid.
The correct answer is:
The correct option is a) .
When CO22 is dissolved in H2O, only some molecules react with H2 to form H2CO3. Most of the molecules dissolves, CO22 remains loosely hydrated. H2CO3 is a weak di-basic acid. It is formed in a series of two salts. CO2 is an hydride of a carbonic acid.
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Reason (R): It is a non-combustible gas and supports combustion.
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In the laboratory preparation of carbon monoxide, hydrochloric acid is only used although sulfuric acid reacts with calcium carbonate in the same way as HCl. However, the sulfuric acid is never used because:
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2. Carbon monoxide is neither combustible nor a supporter of combustion.
3. Dry ice produces at a very low temperature.
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