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A gas that is...

Question

A gas that is practically insoluble in water?

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Solution

For gas to be soluble in the water there are several factors such as-
Temperature - As it is seen that the solubility of a gas in water will decrease with increasing temperature ( colder water will dissolve more gas in it).
Solvent polarity- polar solvents have high solubility in water whereas nonpolar solvents are insoluble.
Hydrogen gas ( $H_{2}$ ) is almost insoluble in water because it is nonpolar in nature.

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Question 3

(a) What are insoluble substances?

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