S P Singh Solutions for Chapter: Chemical Changes and Reactions, Exercise 2: EXERCISE 2(B)

Decomposition reactions can occur by electricity. Give two balanced equations for it. 

Decomposition reactions can occur by sunlight. Give two balanced equations for it.

State the type of reaction for the following equation and balance if it is not balanced. 

$\mathrm{PbO}+2{\mathrm{HNO}}_3\to \mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2+2{\mathrm{H}}_2\mathrm{O}$

State the type of reaction for the following equation and balance if it is not balanced. 

${\mathrm{AgNO}}_3+\mathrm{NaCl}\to \mathrm{AgCl}+{\mathrm{NaNO}}_3$

Which of the following is not a characteristic of a chemical change? 

A reaction of a type: $\mathrm{AB}+\mathrm{CD} \to \mathrm{AD}+\mathrm{CB}$, involves 

The reaction:

${\mathrm{BaCl}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{BaSO}}_4\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)$ is 

Thermal decomposition of sodium carbonate will produce