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Chemical Properties

The salt whic...

Question

The salt which will not react with $N H_{4} O H$ solution is:

A

Z n C l_{2}

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B

C u C l_{2}

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C

N H_{4} C l

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D

F e C l_{2}

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Solution

The correct option is C $N H_{4} C l$
$N H_{4} O H$ does not react with $N H_{4} C l$ because

$N H_{4} O H + N H_{4} C l \to N H_{4}^{+} + O H^{-} + C l^{-}$

same ions still present in the solution and no new compound form.

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Q. Fill in the blanks:
(a) Salts of ________ [normal / transition] elements are generally coloured. From the ions K¹⁺, Cr³⁺, Fe²⁺, Ca²⁺, SO₃²⁻, MnO₄¹⁻, NO₃¹⁻ the ions generally coloured are _________ .
(b) The hydroxide which is soluble in excess of NaOH is ________ [Zn(OH)₂ / Fe(OH)₃ / Fe(OH)₂].
(c) The salt which will not react with NH₄OH solution ________ [ZnCl₂ / CuCl₂ / NH₄Cl / FeCl₂].
(d) The substance/ s which react/ s with hot conc. NaOH solution and undergoes a neutralization reaction ________ [Al₂O₃ / Al / Al(OH)₃].
(e) To distinguish soluble salts of zinc and lead _________ [NaOH / NH₄OH] can be used.

Identify the salt which cannot react with NH₄OH solution.

N H_{4} C l

is not used together with

N H_{4} O H

in group-III reagent which of the following cation will not be precipitated?

{N H}_{4} C l

does not effect the

p H

{N H}_{4} O H

Q. Which of the following reactions will take place?
A. Mg + ZnSO₄ → MgSO₄ + Zn
B. Zn + CuCl₂ → ZnCl₂ + Cu
C. Cu + FeSO₄ → CuSO₄ + Fe
D. Fe + MgCl₂ → FeCl₂ + Mg

(a) C and D
(b) A and B
(c) A, B and C
(d) all the above

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