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Electrolytes

Which of the ...

Question

Which of the following solutions will be acidic?
(1) $0.1 M$ $F e {S O}_{4}$
(2) $0.1 M$ ${({N H}_{4})}_{2} {S O}_{4}$
(3) $0.1 M$ ${C H}_{3} C O O N a$
(4) $0.1 M$ ${N H}_{4} O H$

1,2 and 3 are correct

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1 and 2 are correct

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2 and 4 are correct

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1 and 3 are correct

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Solution

The correct option is B 1 and 2 are correct
$F e S O_{4}$ and $(N H_{4})_{2} S O_{4}$ are salt of salt of strong acid and weak base so they are acidic in nature whereas $C H_{3} C O O N a$ is salt of strong base and weak acid so it is basic in nature.
$N H_{4} O H$ is weak base so it is basic in nature.

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