Question

Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.

Which of the following does not form an acidic salt?
Phosphoric acid
Carbonic acid
Hydrochloric acid
Sulphuric acid
Which of the following salts has no water of crystallization?
Blue vitriol
Washing soda
Baking soda
Gypsum
The formula of baking soda is
K2CO
KHCO3
NaHCO3
Na2CO3
Which of the following is treated with chlorine to obtain bleaching powder
CaSO4
Ca(OH)2
Mg(OH)2
KOH
Which of the following salt is used for removing the permanent hardness of water
Washing soda
Baking soda
Bleaching powder
NaOH​

Answer 1

Answer:

carbonic acid does not forms acidic salt because it is very less reactive

Answer 2

Answer:

1) Carbonic acid

2) Baking soda

3) NaHCO₃

4) Ca(OH)₂

5) Washing soda

Explanation:

1)Carbonic acid does not form an acidic acid. Carbonic acid would be the acid that cannot form an acidic salt because it is a weak acid.

2)Baking soda is sodium bicarbonate in anhydrous form without any water of crystallisation and it is widely used as dry fire extinguisher because of its alkali nature.

4)"Bleaching powder" is made by the action of chloride gas on calcium hydroxide, the reaction being essentially: 2Ca(OH)2 + 2Cl2 → Ca(OCl)2 + CaCl2 + 2H2O.

5)Sodium carbonate (Na2CO3) i.e. Washing soda is used to remove permanent hardness of water.