Chemistry
Give a reason why -
(a) Alcohol & water form a miscible mixture while oil & water do not.
(b) Boiled water tastes flat.
(c) On opening a bottle of soda the gas escapes out with a 'fizz'.
Water
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Answer
(a) As alcohol is soluble in water hence they form a miscible mixture whereas oil is not soluble in water hence they both form an immiscible mixture.
(b) As soluble gases in water contribute to the taste of water and on boiling, the temperature of the water increases, thereby the solubility of the dissolved gases decreases and the dissolved gases are expelled out. Hence, boiled water tastes flat.
(c) Soda bottles contains carbon dioxide dissolved in water under pressure. On opening the bottle, the pressure decreases hence solubility of dissolved carbon dioxide decreases & the gas escapes out with a 'fizz'.
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