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Question

Which of the following salts will give basic solution on hydrolysis?
  1. NH4Cl
  2. KCl
  3. K2CO3
  4. (NH4)2CO3

A
NH4Cl
B
(NH4)2CO3
C
KCl
D
K2CO3
Solution
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K2CO3+2H2OH2CO3+2KOH
KOHK++OH(base)
It is a double displacement reaction, where the anioins and cations of two different molecules switch places, forming two entirely different compounds.
K2CO3 potassium carbonate on hydrolysis gives KOH which is a strong base and is highly ionisable and therefore the solution becomes strongly basic.

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