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Preparation from Manganese Dioxide

Why does Eno'...

Question

Why does Eno's salt give effervescence when water is added to it?

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Solution

Carbon dioxide gas comes out of the salt producing effervescence.

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Similar questions

Q. Why does kerosene not burn when water is added to it?

Give reasons for the following :

(a) Sulphuric acid forms two types of salts with NaOH,

(b) Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide,

(c) A piece of wood becomes black when concentrated sulphuric acid is poured on it,

(d) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

Q. Identify the salts

P

Q

from the observations given below:
When dilute

H C l

is added to a salt

Q

, a brisk effervescence is produced and the gas turns lime water milky.
When

N H_{4} O H

solution is added to the above mixture (after adding dilute

H C l

), it produces a white precipitate which is soluble in excess

N H_{4} O H

Q. When salt is added to water and stirred, the salt particles disappear and we get a clear salt solution. Give reasons.

K_{2} [P t {C l}_{4}]

get ionized when dissolved in water? Will it form precipitate when

A g N O_{3}

solution is added to it? Give a reason for your answer.

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Preparation from Manganese Dioxide

Standard VIII Chemistry

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