Which of the following is not a redox reaction ?

C u O + H_{2} \to C u + H_{2} O

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N a + H_{2} O \to N a O H + \frac{1}{2} H_{2}

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C a C O_{3} \to C a O + C O_{2}

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2 K + F_{2} \to 2 K F

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Solution

The correct option is A $C a C O_{3} \to C a O + C O_{2}$
Redox reaction involves both oxidation and reduction reactions which are complimentary to each other.
In the reaction given in option C, there is no change in the oxidation states of any atom. Hence it is not redox reaction. This reaction does not involve either oxidation or reduction. The type of this reaction is called as decomposition.
$+ 2 C a + 4 C {- 2 O}_{3}$ $\to$ $+ 2 C a - 2 O + + 4 C {- 2 O}_{2}$

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Similar questions

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

Identify the correct order of acidic strength of $C O_{2}$ , $C u O$ , $C a O$ , and $H_{2} O$ :

Q. Read the redox reaction given below and answer the questions:

C u O + H_{2} ⟶ C u + H_{2} O

(a) Conversion of

C u O

into

C u

is called _______.
(b) Conversion of

H_{2}

into

H_{2} O

is called _______.

Q. Identify the correct order of acidic strength of

C O_{2}, C u O, C a O

and

H_{2} O

Q. Identify the correct order of acidic strengths of

C O_{2}, C u O, C a O

and

H_{2} O

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