The Aqueous Solution of One of the Following Salts Will Turn Phenolphthalein Indicator Pink. this Salt Is: (A) Kcl (B) K2so4 (C) K2co3 (D) Kno3 - Science

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The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
(a) KCl
(b) K₂SO₄
(c) K₂CO₃
(d) KNO₃

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Solution

K₂CO₃
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, and thus, it is basic. As the aqueous solution of the salt is basic, it turns a phenolphthalein indicator pink.

Concept: Salts

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Chapter 2: Acids, Bases and Salts [Page 99]

Q 62 Q 61 Q 63

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Lakhmir Singh Class 10 Chemistry (Science)

Chapter 2 Acids, Bases and Salts
Q 62 | Page 99

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The Aqueous Solution of One of the Following Salts Will Turn Phenolphthalein Indicator Pink. this Salt Is: (A) Kcl (B) K2so4 (C) K2co3 (D) Kno3 - Science

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