Rajesh Singh, Indu Gupta and, Sikha Sharma Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Multiple Choice Questions (MCQs)

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is 

Which of the following is(are) an endothermic process(es)?

(i) Dilution of sulphuric acid

(ii) Sublimation of dry ice

(iii) Condensation of water vapours

(iv) Evaporation of water

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

The following reaction is used for the preparation of oxygen gas in the laboratory

$2{\mathrm{KClO}}_3\left(\mathrm{s}\right) \underset{\mathrm{Catalyst}}{\overset{\mathrm{Heat}}{\to }} 2\mathrm{KCl}\left(\mathrm{s}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)$

Which of the following statement(s) is/are correct about the reaction?

Which one of the following processes involve chemical reactions?

In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?

Which of the following are combination reactions?

(i) $2{\mathrm{KClO}}_3 \stackrel{\mathrm{Heat}}{\to } 2\mathrm{KCl}+3{\mathrm{O}}_2$

(ii) $\mathrm{MgO}+{\mathrm{H}}_2\mathrm{O} \stackrel{ }{\to } \mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

(iii) $4\mathrm{Al}+3{\mathrm{O}}_2 \stackrel{ }{\to } 2{\mathrm{Al}}_2{\mathrm{O}}_3$

(iv) $\mathrm{Zn}+{\mathrm{FeSO}}_4 \stackrel{ }{\to } {\mathrm{ZnSO}}_4+\mathrm{Fe}$