Explain the following:
(a) Carbonic acid gives an acid salt but hydrochloric acid does not.

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Solution

Carbonic acid is a dibasic acid. Thus, it has two replaceable hydrogen atoms. Hence, it forms one acid salt and one normal salt. $HCL$ is a monobasic acid. It has only one replaceable hydrogen atom. As a result, it forms only a normal salt.

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Question 08.
Which of the following gives the correct increasing order of acid strength?
(a) Water < Acetic Acid< Hydrochloric Acid
(b) Water < Hydrochloric Acid < Acetic Acid
(c) Acetic Acid < Water < Hydrochloric Acid
(d) Hydrochloric Acid < Water < Acetic Acid

Give reason for the following :

(a) Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid.

(b) Potassium and sodium are not used fro reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen.

An acid which can decolourise purple coloured potassium permanganate solution is :

(a) sulphuric acid (b) citric acid

Q. When treated with dilute hydrochloric acid, which of the following gives a gas which does not turn lime water milky?
(1) sodium sulphate
(2) sodium carbonate
(3) copper metal
(4) zinc metal

Question 24.
Which of the following statements is not correct ?

(a) All metal carbonates react with acid to give a salt, water and carbon dioxide
(b) All metal oxides react with water to give salt and acid
(c) Some metals react with acids to give salt and hydrogen
(d) Some non-metal oxides react with water to form an acid

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Neutralization

Standard VIII Chemistry

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Explain the following: (a) Carbonic acid gives an acid salt but hydrochloric acid does not.

Carbonic acid is a dibasic acid. Thus, it has two replaceable hydrogen atoms. Hence, it forms one acid salt and one normal salt. HCL is a monobasic acid. It has only one replaceable hydrogen atom. As a result, it forms only a normal salt.

Explain the following:
(a) Carbonic acid gives an acid salt but hydrochloric acid does not.

Carbonic acid is a dibasic acid. Thus, it has two replaceable hydrogen atoms. Hence, it forms one acid salt and one normal salt. $HCL$ is a monobasic acid. It has only one replaceable hydrogen atom. As a result, it forms only a normal salt.