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What type of reactions are represented by the following equations? \[\left( \mathbf{a} \right)\text{ }\mathbf{CaO}\text{ }+\text{ }\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{CaC}{{\mathbf{O}}_{\mathbf{3}}}\] \[\left( \mathbf{b} \right)\text{ }\mathbf{2Na}\text{ }+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }\to \text{ }\mathbf{2NaOH}\text{ }+{{\mathbf{H}}_{\mathbf{2}}}\] \[\left( \mathbf{c} \right)\text{ }\mathbf{Mg}\text{ }+\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}\to \text{ }\mathbf{MgS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{Cu}\] \[\left( \mathbf{d} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{4}}}\mathbf{N}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }{{\mathbf{N}}_{\mathbf{2}}}~+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\] \[\left( \mathbf{e} \right)\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{2NaOH}\text{ }\to \mathbf{Cu}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~+\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}\]
What type of reactions are represented by the following equations?
\[\left( \mathbf{a} \right)\text{ }\mathbf{CaO}\text{ }+\text{ }\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{CaC}{{\mathbf{O}}_{\mathbf{3}}}\]
\[\left( \mathbf{b} \right)\text{ }\mathbf{2Na}\text{ }+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }\to \text{ }\mathbf{2NaOH}\text{ }+{{\mathbf{H}}_{\mathbf{2}}}\]
\[\left( \mathbf{c} \right)\text{ }\mathbf{Mg}\text{ }+\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}\to \text{ }\mathbf{MgS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{Cu}\]
\[\left( \mathbf{d} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{4}}}\mathbf{N}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }{{\mathbf{N}}_{\mathbf{2}}}~+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]
\[\left( \mathbf{e} \right)\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{2NaOH}\text{ }\to \mathbf{Cu}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~+\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}\]
CBSE | Chemical Reactions and Equations | Chemistry | Class 10 | Lakhmir Singh
What type of reactions are represented by the following equations?
\[\left( \mathbf{a} \right)\text{ }\mathbf{CaO}\text{ }+\text{ }\mathbf{C}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }\mathbf{CaC}{{\mathbf{O}}_{\mathbf{3}}}\]
\[\left( \mathbf{b} \right)\text{ }\mathbf{2Na}\text{ }+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\text{ }\to \text{ }\mathbf{2NaOH}\text{ }+{{\mathbf{H}}_{\mathbf{2}}}\]
\[\left( \mathbf{c} \right)\text{ }\mathbf{Mg}\text{ }+\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}\to \text{ }\mathbf{MgS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{Cu}\]
\[\left( \mathbf{d} \right)\text{ }\mathbf{N}{{\mathbf{H}}_{\mathbf{4}}}\mathbf{N}{{\mathbf{O}}_{\mathbf{2}}}\to \text{ }{{\mathbf{N}}_{\mathbf{2}}}~+\mathbf{2}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{O}\]
\[\left( \mathbf{e} \right)\text{ }\mathbf{CuS}{{\mathbf{O}}_{\mathbf{4}}}~+\text{ }\mathbf{2NaOH}\text{ }\to \mathbf{Cu}{{\left( \mathbf{OH} \right)}_{\mathbf{2}}}~+\mathbf{N}{{\mathbf{a}}_{\mathbf{2}}}\mathbf{S}{{\mathbf{O}}_{\mathbf{4}}}\]

(a) Combination reaction, since calcium oxide combines with carbon dioxide to calcium carbonate.

(b) Displacement reaction, since sodium replaces oxygen to give sodium hydroxide.

(c) Displacement reaction since magnesium replaces calcium to give magnesium sulphate.

(d) Decomposition reaction, since ammonium nitrate decomposes to give nitrogen and water.

(e) Double displacement reaction, since copper sulphate and sodium hydroxide react and displace components from one another to give copper hydroxide and sodium sulphate.

i

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