Question

Match the following reactions in column 1 with the correc type given in column 2.
Column 1 Column 2

${\text{a. Fe}}^{2+}\to {\text{Fe}}^{3+}+e^{-}$	(i) Decomposition
$b.2AgBr\left(s\right)\to 2Ag\left(s\right)+B{r}_2\left(g\right)$	(ii) Reduction
$c.2Mg\left(s\right)+O_2\left(g\right)\to 2MgO\left(s\right)$	(iii) Oxidation
${\text{d. Mg}}^{2+}+2e^{-}\to \text{Mg}\left(s\right)$	(iv) Combination

• A. a-(ii), b-(iv), c-(i), d-(iii)
• B. a-(ii), b-(i), c-(iv), d-(iii)
• C. a-(iii), b-(i), c-(iv), d-(ii)
• D. a-(iii), b-(iv), c-(i), d-(ii)

Answer 1

The correct option is C a-(iii), b-(i), c-(iv), d-(ii)

• ${\text{Fe}}^{2+}\to {\text{Fe}}^{3+}+e^{-}$
• This reaction involves removal of an electron. Reactions involving loss of electrons are known as oxidation reactions.
  
• $2AgBr\left(s\right)\to 2Ag\left(s\right)+B{r}_2\left(g\right)$
• This reaction involves formation of two products from a single reactant. Hence it is a decomposition reaction.
  
• ${\text{Mg}}^{2+}+2e\to {\text{Mg}}^{}$
• This reaction involves gaining of electrons and hence this is reduction reaction.
  
• $2Mg\left(s\right)+O_2\left(g\right)\to 2MgO\left(s\right)$
• This reaction is a combination reaction as two reactants combine to form a single product.

Correct option: (A)