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प्रश्न
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate
उत्तर
potassium carbonate
Potassium carbonate (K2CO3) is formed from a weak acid, carbonic acid (H2CO3), and a strong base, potassium hydroxide (KOH). On hydrolysis, K2CO3 forms more OH- ions than H+ ions. Thus, it is basic and therefore turns red litmus blue.
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संबंधित प्रश्न
Write the chemical name and formula of common salt.
Complete and balance the following chemical equations:
`NaCI (aq) + H_2O (l) `
Name a salts whose solubility increases with temperature.
Name a salt whose solubility decreases with temperature.
Name two carbonates do not produce carbon dioxide on heating.
Distinguish by a chemical test, Sodium carbonate and sodium sulphite.
Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.
Identify the following substance:
Gas C has an offensive smell like rotten eggs.
What are hygroscopic substances?
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
