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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
The salt prepared by the method of direct combination is _______.
What is a salt?
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is
(a) potassium sulphate
(b) sodium carbonate
(c) ammonium sulphate
(d) sodium acetate
When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?
A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
What is a ‘salt’?
Explain ‘salt hydrolysis’
Taking sodium carbonate as an example, give the meaning of the following terms: Anhydrous.
Distinguish by a chemical test, Sodium carbonate and sodium sulphite.
Differentiate hydrate and anhydrous salts with examples.
