Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • What type of redox reaction is the following? <img alt="N_{2\left ( g \right )}+3H_{2\left (g \right )}\rightarrow 2NH_{3(g)}" src="http://entrancecorner.oncodecogs.com/gif.latex?N_%7B2%5

What type of redox reaction is the following?

N_{2\left ( g \right )}+3H_{2\left (g \right )}\rightarrow 2NH_{3(g)}

Option: 1

Decomposition Reaction


Option: 2

Combination Reaction


Option: 3

Displacement Reaction


Option: 4

Disproportionate Reaction


Answers (1)

best_answer

The different types of redox reactions are:

  • Decomposition Reaction
  • Combination Reaction
  • Displacement Reaction
  • Disproportionation Reactions

Decomposition Reaction
This is the reaction that involves the breakdown of a compound into different compounds. Some examples of this type of reaction are:

2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \stackrel{\Delta}{\longrightarrow} 2 \mathrm{H}_{2}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{g})
2 \mathrm{KClO}_{3}(\mathrm{s}) \stackrel{\Delta}{\longrightarrow} 2 \mathrm{KCl}(\mathrm{s})+3 \mathrm{O}_{2}(\mathrm{g})

This must be noted here that all decomposition reactions are not redox reactions. For example, the decomposition of calcium carbonate is not a redox reaction.
\mathrm{CaCO}_{3}(\mathrm{s}) \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{g})

Combination Reaction
These types of reactions are the opposite of decomposition reactions and hence involve the combination of two compounds to form a single compound. Some examples include:

\mathrm{C}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{g}) \stackrel{\Delta}{\longrightarrow} \mathrm{CO}_{2}(\mathrm{g})
\mathrm{CH}_{4}(\mathrm{g})+2 \mathrm{O}_{2}(\mathrm{g}) \stackrel{\Delta}{\longrightarrow} \mathrm{CO}_{2}(\mathrm{g})

Displacement Reaction
Displacement reactions, also known as replacement reactions, involve compounds and the replacing of elements. They occur as single and double replacement reactions. In other words, in these types of reactions, an atom or an ion in a compound is substituted by another element. The general representation of this reaction is as follows:

\mathrm{X}+\mathrm{YZ} \rightarrow \mathrm{XZ}+\mathrm{Y}

Disproportionation Reactions

Disproportionation reactions are those reactions in which a single element in one oxidation state is simultaneously oxidized and reduced. Some examples include:

\mathrm{P}_{4}(\mathrm{s})+3 \mathrm{OH^{-}}(\mathrm{aq})+3 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{PH}_{3}(\mathrm{g})+3 \mathrm{H}_{2} \mathrm{PO}_{2}^{-}
\begin{array}{r}{\mathrm{S}_{8}(\mathrm{s})+12 \mathrm{OH}(\mathrm{aq}) \rightarrow 4 \mathrm{S}^{2-}(\mathrm{aq})+2 \mathrm{S}_{2} \mathrm{O}_{3}^{2}(\mathrm{aq})} \: {+6 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})}\end{array}

-

Since the reaction fits the form:A+B\rightarrow C and either A or B is in elemental
form so it's a combination reaction.

Therefore,option(2) is correct.

Posted by

Suraj Bhandari

View full answer

Similar Questions

Latest Question