Question

On heating the reactant, which of the following chemical reactions will not take place?

• A. $2{\mathrm{KClO}}_3\to 2\mathrm{KCl}+3{\mathrm{O}}_2$
• B. ${\mathrm{CaCO}}_3\to \mathrm{CaO}+{\mathrm{CO}}_2$
• C. $2{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{H}}_2+{\mathrm{O}}_2$
• D. $2{\mathrm{H}}_2{\mathrm{O}}_2\to 2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

Answer 1

The correct option is A

$2{\mathrm{KClO}}_3\to 2\mathrm{KCl}+3{\mathrm{O}}_2$

• Among the following reactions, in $2{\mathrm{KClO}}_3\to 2\mathrm{KCl}+3{\mathrm{O}}_2$ the chemical reaction will not take place because ${\mathrm{KClO}}_3$ (Potassium chlorate) will decompose to form $\mathrm{KCl}$(Potassium chloride) and ${\mathrm{O}}_2$(Oxygen gas) only in presence of a Manganese dioxide catalyst.
• But in the remaining reactions, chemical reactions will take place without the presence of a catalyst to give the desired product.

Hence, option (a) is correct.