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Electrochemical Cells, Galvanic Cells

Consider foll...

Question

Consider following redox reactions:

$I : {({N H}_{4})}_{2} {C r}_{2} O_{7} ⟶ N_{2} + {C r}_{2} O_{3} + H_{2} O$

$I I : {N H}_{4} {N O}_{3} ⟶ N_{2} O + 2 H_{2} O$

$I I I : 2 K C l O_{3} ⟶ 2 K C l + 3 O_{2}$

Select intramolecular redox reactions.

A

I, I I

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B

I I, I I I

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C

I, I I I

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D

I, I I, I I I

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Solution

The correct option is D $I, I I, I I I$
Intramolecular redox reactions are the reactions in which one element of a compound is oxidised while the other is reduced.

Substance
Oxidised Reduced
$I . {({N H}_{4})}_{2} {C r}_{2} O_{7}$

${N H}_{4}^{+} t o N_{2}$
-3 0
${C r}_{2} O_{7}^{2 -} t o {C r}^{3 +}$
+6 +3
$I I . {N H}_{4} {N O}_{3}$

${N H}_{4}^{+} t o N_{2} O$
-3 +1
$N O_{3}^{-} t o N_{2} O$
+5 +1
$I I I . K C l O_{3}$

$O^{-} t o O_{2}$
-1 0
$C l O_{3}^{-} t o {C l}^{-}$
+5 -1

Hence, all the three are intramolecular redox reactions.

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Similar questions

Q. Out of the following redox reactions, disproportionation is not shown in:

I

{N H}_{4} {N O}_{3} Δ - \to N_{2} O + 2 H_{2} O

I I

{N H}_{4} {N O}_{2} Δ - \to N_{2} + 2 H_{2} O

I I I

P {C l}_{5} Δ - \to P {C l}_{3} + {C l}_{2}

Q. Which of the following represent redox reactions?
I.

{C r}_{2} O_{7}^{2 -} + 2 ⊖ O H ⟶ 2 C r O_{4}^{2 -} + H_{2} O

Z n + C u S O_{4} ⟶ Z n S O_{4} + C u

2 M n O_{4}^{⊖} + 3 {M n}^{2 +} + 4 ⊖ O H ⟶ 5 M n O_{2} + 2 H_{2} O

2 {C u}^{\oplus} ⟶ C u + {C u}^{2 +}

Q. Which of the following not represents redox reactions?
I.

{C r}_{2} O_{7}^{2 -} + 2 ⊖ O H ⟶ 2 C r O_{4}^{2 -} + H_{2} O

Z n + C u S O_{4} ⟶ Z n S O_{4} + C u

2 M n O_{4}^{⊖} + 3 {M n}^{2 +} + 4 ⊖ O H ⟶ 5 M n O_{2} + 2 H_{2} O

2 {C u}^{\oplus} ⟶ C u + {C u}^{2 +}

Q. Question 2

The following reaction is an example of a

4 {NH}_{3} (g) + 5 O_{2} (g) \to 4 NO(g) + 6 H_{2} O(g)

(i) Displacement reaction
(ii) Combination reaction
(iii) Redox reaction
(iv) Neutralisation reaction

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)

Q. Consider the following anions:

When attached to

s_{p^{3}}

-hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order:

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