Which of the following salts will give basic solution on hydrolysis?
NH4Cl
KCl
K2CO3
(NH4)2CO3
A
NH4Cl
B
(NH4)2CO3
C
KCl
D
K2CO3
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Solution
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K2CO3+2H2O⇌H2CO3+2KOH
KOH⇌K++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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