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Tests for Hydrogen

In the reacti...

Question

In the reaction Zn +2 $H^{+}$ +2 $C l^{-}$ $⟶$ $Z n^{+} 2$ + 2 $C l^{-}$ + $H_{2}$ the spectator ion

$Z n + 2 H^{+} + 2 C l^{-} - - - - - - - > Z n^{2 +} + 2 C l^{-} + H_{2}$

Cl⁻

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Zn²⁺

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H⁺

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All of these

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Solution

The correct option is A
Cl⁻

The ion which is not affected during the course of reaction is known as spectator ion.

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Similar questions

Divide the following redox reactions into oxidation and reduction half reactions.

(i) $Z n + P b^{2} \to Z n^{2} + P b$

(ii) $Z n + C u^{2 +} \to Z n^{2} + C u$

(iii) $C l_{2} + 2 B r^{-} \to B r_{2} + 2 C l^{-}$

Z n (s) + C l_{2} (1 atm) \to Z n^{2 +} + 2 C l^{-}

E^{\circ}

2.12 V

E

Z n (s) + C l_{2} (1

) \to Z n^{2 +} + 2 C l^{-} : E^{o} = 2.12 V

The secondary reactions which takes place in dry cell are:

1) $M n O_{2} + N H_{4}^{+} + e^{-} \to M n O (O H) + N H_{3}$

2) $2 N H_{4} C l + 2 (O H^{-}) \to$ $2 N H_{3} + 2 C l^{-} + 2 H_{2} O$

3) $Z n + 2 M n O_{2} \to$ $[Z n (N H_{3})_{2}] + 2 O H^{-} + 2 M n O (O H)$

4) $Z n^{2 +} 2 N H_{3} + 2 C l^{-} \to$ $[Z n (N H_{3})_{2}] C l_{2} or Z n C l_{2} .2 N H_{3}$

Correct statements are:

E^{o}

{Z n}^{2 +} | Z n

- 0.76

Z n ∣ ∣ {Z n}^{2 +} (1 M) ∣ ∣ ∣ ∣ 2 H^{+} (1 M) ∣ ∣ H_{2} (1 a t m)

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