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Types of Redox Reactions

Which of the ...

Question

Which of the following represents a redox reaction?

A

N a O H + H C l ⟶ N a C l + H_{2} O

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B

B a {C l}_{2} + H_{2} S O_{4} ⟶ B a S O_{4} + 2 H C l

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C

C u S O_{4} + 2 H_{2} O ⟶ C u {(O H)}_{2} + H_{2} S O_{4}

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D

Z n + 2 H C l ⟶ Z n {C l}_{2} + H_{2}

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Solution

The correct option is C $Z n + 2 H C l ⟶ Z n {C l}_{2} + H_{2}$
$N a O H + H C l ⟶ N a C l + H_{2} O$
$B a {C l}_{2} + H_{2} S O_{4} ⟶ B a S O_{4} + 2 H C l$
The above two reactions are neutralisation reactions as they are acid-base reactions.
$C u S O_{4} + 2 H_{2} O ⟶ C u {(O H)}_{2} + H_{2} S O_{4}$
The oxidation state of $C u$ is $+ 2$ in both reactant and product and that of $S O_{4}^{2 -}$ ion does not change. So, it is none.
$Z n + 2 H C l ⟶ Z n {C l}_{2} + H_{2}$
It is a redox reaction.
The half cell reactions are given below:
$Z n ⟶ Z n^{2 +} + 2 e^{-}$
$2 H^{\oplus} + 2 e^{-} ⟶ H_{2}$

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Similar questions

Q. A list of reactions are given below.

F e + 2 H C l \to F e C l_{2} + H_{2}

F e S + 2 H C l \to F e C l_{2} + H_{2} S

F e + S Δ - \to F e S

N a C l + H_{2} S O_{4} < 200^{o} C - --- \to N a H S O_{4} + H C l

C u S O_{4} + H_{2} S \to C u S + H_{2} S O_{4}

S + H_{2} S O_{4} \to 3 S O_{2} + H_{2} O

Identify redox reactions.

Q. Which of the following reactions is/are a double displacement reaction(s) ?
(i)

A g N O_{3} + N a B r \to N a N O_{3} + A g B r

B a C l_{2} + H_{2} S O_{4} \to B a S O_{4} + 2 H C l

A g N O_{3} + N a C l \to A g C l + N a N O_{3}

N a O H + H C l \to N a C l + H_{2} O

Which of the following is not an example of redox reaction?
(a) $C u O + H_{2} \to C u + H_{2} O$
(b) $F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$
(c) $2 K + F_{2} \to 2 K F$
(d) $B a C l_{2} + H_{2} S O_{4} \to B a S O_{4} + 2 H C l$

Q. The reaction

B a C l_{2} + H_{2} S O_{4} \to B a S O_{4} + 2 H C l

Q. Balance the following chemical equations:

H N O_{3} + C a {(O H)}_{2} \to C a {(N O_{3})}_{2} + H_{2} O

N a O H + H_{2} S O_{4} \to {N a}_{2} S O_{4} + H_{2} O

N a C l + A g N O_{3} \to A g C l + N a N O_{3}

B a {C l}_{2} + H_{2} S O_{4} \to B a S O_{4} + H C l

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