A decomposition reaction should look like
A ------> B +C+...
It has to have only one reactant and several products.
2 NO2 ⟶ 2 O2 + N2
Answer : The correct option is, [tex]2NO_2\rightarrow 2O_2+N_2[/tex]
Explanation :
Decomposition reaction : It is a type of reaction in which a single larger compound decomposes to give two or more smaller molecules as a product.
The general representation of decomposition reaction is :
[tex]AB\rightarrow A+B[/tex]
From the given options,
[tex]2NO_2\rightarrow 2O_2+N_2[/tex] this reaction a decomposition reaction in which a single nitrogen dioxide decomposes to give oxygen gas and nitrogen gas as a product.
While the other reactions,
[tex]2NH_3+H_2SO_4\rightarrow (NH_4)_2SO_4[/tex] this reaction is a combination reaction in which the two or more molecules combine to form a larger single molecule as a product.
[tex]2NaBr+Ca(OH)_2\righatrrow CaBr_2+2NaOH[/tex] this is a double displacement reaction in which the cation and the anion of the two reactant exchange their places to give two another compounds as a product.
[tex]3Pb+2H_3PO_4\rightarrow 3H_2+Pb_3(PO_4)_2[/tex] this is a single displacement reaction in which the more reactive metal displaces the least reaction metal from its compound.
Hence, the decomposition reaction will be, [tex]2NO_2\rightarrow 2O_2+N_2[/tex]
