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Standard XII

Chemistry

Dissolution of Solids and Gases in Liquid

Which of the ...

Question

Which of the following reactions does not occur?

F_{2} + 2 C l^{-} \to 2 F^{-} + C l_{2}

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C l_{2} + 2 F^{-} \to 2 C l^{-} + F_{2}

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B r_{2} + 2 I^{-} \to 2 B r^{-} + I_{2}

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C l_{2} + 2 B r^{-} \to 2 C l^{-} + B r_{2}

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Solution

The correct option is C $C l_{2} + 2 F^{-} \to 2 C l^{-} + F_{2}$
$C l_{2}$ cannot replace $(F^{-})$ ion as it needs to
oxidise $F^{-}$ ion. But, $F^{-}$ is the most powerful oxidizing agent. Reverse reaction is feasible.

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

Q. Consider the reaction,

C l_{2} + 2 B r^{-} (a q) ⟶ 2 C l^{-} (a q) + B r_{2}

The emf of the cell when

[C l^{-}] = [B r_{2}] = [B r^{-}] = 0.01 M

and

C l_{2}

gas at

1

atm pressure will be:

(

E^{o}

for the above reaction is = 0.29 volt)

Q. Consider the following orders –
(1)

F_{2} > C l_{2} > B r_{2} > I_{2} :

boiling point
(2)

F_{2} > C l_{2} > B r_{2} > I_{2} :

oxidizing nature
(3)

F_{2} > C l_{2} > B r_{2} > I_{2} :

EN
(4)

F_{2} > C l_{2} > B r_{2} > I_{2} :

BDE
(5)

F_{2} > C l_{2} > B r_{2} > I_{2} :

EA
(6)

F_{2} > C l_{2} > B r_{2} > I_{2} :

Reactivity
(7)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Acidic nature
(8)

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

Oxidizing nature
Then calculate

(x^{2} + y^{2})

when

x

is correct order and

y

is incorrect order.

Q. Increasing oxidising nature of

I_{2}, {B r}_{2}, {C l}_{2}, F_{2}

is :

I_{2} < {B r}_{2} < {C l}_{2} < F_{2}

.
if true enter 1, else enter 0.

Q. Which of the following options does not give to the correct trends indicated against it?
(I)

F_{2} > C l_{2} > B r_{2} > I_{2}

: Bond dissociation energy
(II)

F_{2} > C l_{2} > B r_{2} > I_{2}

: Oxidizing nature
(III)

C l > F > B r > I

: Electron gain enthalpy
(IV)

F > C l > B r > I

: Electronegativity

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Which of the following reactions does not occur?

The correct option is C Cl2+2F−→2Cl−+F2Cl2 cannot replace (F−) ion as it needs to oxidise F− ion. But, F− is the most powerful oxidizing agent. Reverse reaction is feasible.

The correct option is C $C l_{2} + 2 F^{-} \to 2 C l^{-} + F_{2}$
$C l_{2}$ cannot replace $(F^{-})$ ion as it needs to
oxidise $F^{-}$ ion. But, $F^{-}$ is the most powerful oxidizing agent. Reverse reaction is feasible.