Arrange them in the increasing order of their pH value: LiF,KI,MgCl2
A
MgCl2<KI<LiF
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B
MgCl2<LiF<KI
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C
LiF<MgCl2<KI
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D
KI<MgCl2<LiF
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Solution
The correct option is AMgCl2<KI<LiF A salt of strong acid and weak base has a pH less than 7 while a salt of weak acid and strong base has a pH greater than 7.