Question

Correct the following statement:
For example 'Chlorine is a bleaching agent.'
Should read 'Moist chlorine is a bleaching agent."
Copper reacts with nitric acid to produce nitrogen dioxide.

Answer 1

• Copper reacts with concentrated nitric acid(${\mathrm{HNO}}_3$) to produce nitrogen dioxide(${\mathrm{NO}}_2$).
• One mole of copper interacts with four moles of concentrated nitric acid to form one mole of copper nitrate, two moles of nitrogen dioxide and two moles of water.
• Above reaction can be seen in below equation:

$\underset{\mathrm{Copper}}{\mathrm{Cu}}+\underset{\mathrm{Concentrated}\mathrm{Nitric}\mathrm{Acid}}{4{\mathrm{HNO}}_3(\mathrm{conc}.)}\to \underset{\mathrm{Copper}\mathrm{Nitrate}}{\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2}+\underset{\mathrm{Nitrogen}\mathrm{Dioxide}}{2{\mathrm{NO}}_2}+\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}}$