Maharashtra Board Solutions for Chapter: Chemical Reactions and Equations, Exercise 10: Exercise

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

When electric current is passed through acidulated water ______ of water takes place.

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)

Addition of an aqueous solution of ${\mathrm{ZnSO}}_4$ to an aqueous solution of ${\mathrm{BaCl}}_2$ is an example of ______ reaction.

Identify from the following reaction, the reactants that undergo oxidation and reduction.

$2{\mathrm{Ag}}_2\mathrm{O} \to 4 \mathrm{Ag} + {\mathrm{O}}_2$

Identify from the following reaction, the reactants that undergo oxidation and reduction.

$2\mathrm{Mg} + {\mathrm{O}}_2\to 2\mathrm{MgO}$

Identify from the following reaction, the reactants that undergo oxidation and reduction.

$\mathrm{NiO} + {\mathrm{H}}_2\to \mathrm{Ni} + {\mathrm{H}}_2\mathrm{O}$

Identify the given reaction as endothermic or exothermic reaction.

$2{\mathrm{KClO}}_3\left(\mathrm{s}\right) \stackrel{ }{\stackrel{∆}{\to }} 2\mathrm{KCl}\left(\mathrm{s}\right) + 3{\mathrm{O}}_2\uparrow$

Identify the given reaction as endothermic or exothermic reaction.

$\mathrm{CaO} + {\mathrm{H}}_2\mathrm{O} \to \mathrm{Ca}(\mathrm{OH}{)}_2 + \mathrm{heat}$

Identify the given reaction as endothermic or exothermic reaction.

${{\mathrm{CaCO}}_3}_{\left(\mathrm{s}\right)} \stackrel{∆}{\to } {\mathrm{CaO}}_{\left(\mathrm{s}\right)} + {\mathrm{CO}}_2 \uparrow$