Question

Match column I with column II and select the correct option from the codes given below.

Column I	Column II
(a) $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$	(i) Displacement reaction
(b) $ZnC{O}_3\stackrel{\Delta }{\to }ZnO+C{O}_2$	(ii) Redox reaction
(c) $H_2{O}_{2\left(aq\right)}\stackrel{light}{\to }{H}_2+O_2$	(iii) Thermal decomposition
(d) $2Na+2H_{2}O\to 2NaOH+H_2$	(iv) Photochemical reaction

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

Answer 1

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

Column I	Column II
(a) $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$	Redox reaction
(b) $ZnC{O}_3\stackrel{\Delta }{\to }ZnO+C{O}_2$	Thermal decomposition
(c) $H_2{O}_{2\left(aq\right)}\stackrel{light}{\to }{H}_2+O_2$	Photochemical reaction
(d) $2Na+2H_{2}O\to 2NaOH+H_2$	Displacement reaction

A displacement reaction is a type of reaction where part of one reactant is replaced by another reactant.
Thermal decomposition is a chemical decomposition caused by heat. The decomposition temperature of a substance is the temperature at which the substance chemically decomposes. The reaction is usually endothermic as heat is required to break chemical bonds in the compound undergoing decomposition.
An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species.