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Elementary and Complex Reactions

Slowest react...

Question

Slowest reaction among the following under identical conditions is:

A

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

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B

H^{+} + O H^{-} \to H_{2} O

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C

2 N O + O_{2} \to 2 N O_{2}

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D

C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O

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Solution

The correct option is D $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$
The reaction $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$ is the combustion reaction for methane to produce carbon dioxide and water. It requires more number of bond rearrangements.

Hence, it is the slowest reaction.

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Q. Match the column I with column II to identify the products of oxidation of alkanes and mark the appropriate choice.

	Column I		Column II
(A)	$C H_{4} + 2 O_{2} K M n O_{4} - ---- \to [O]$	(i)	$H C O O H + H_{2} O$
(B)	$2 C H_{4} + O_{2} C u / 523 K - ----- \to 100 a t m$	(ii)	$C O_{2} + 2 H_{2} O$
(C)	$C H_{4} + O_{2} M o_{2} O_{3} - ----- \to Δ$	(iii)	$2 C H_{3} O H$
(D)	$C H_{4} + \frac{3}{2} O_{2} (C H_{3} C O O)_{2} M n - --------- \to$	(iv)	$H C H O + H_{2} O$

Q. Balance the following reaction.

C H_{4} + O_{2} \to C O_{2} + H_{2} O

Q. In the reactions,

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

H_{2} S O_{4} + 2 N a O H \to N a_{2} S O_{4} + 2 H_{2} O + y c a l

Q. Balance the following equations:

M n O_{2} + H C l \to M n C l_{2} + C l_{2} + H_{2} O

N H_{4} C l + C a (O H)_{2} \to N H_{3} + C a C l_{2} + H_{2} O

B a C l_{2} + A l_{2} (S O_{4})_{3} \to B a S O_{4} + A l C l_{3}

N a A l O_{2} + H_{2} O + C O_{2} \to A l H_{3} + N a_{2} C O_{3}

N H_{3} + O_{2} \to N O + H_{2} O

Z n + H N O_{3} \to Z n (N O_{3})_{2} + N O_{2} + H_{2} O

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

P b O + C \to P b + C O_{2}

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

C H_{4} + O_{2} \to C O_{2} + H_{2} O

Q. The following reactions evolve gases along with other products:

N a H C O_{3} + H C l \to

N a O H + Z n \to

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

M n O_{2} + H C l \to

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

Identify the gases evolved in the above reactions?

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