Question

Give one word/ a few words for each of the following.

The reaction of metal with oxygen which gives a golden-yellow flame

Answer 1

• The reaction of sodium metal with oxygen gives a golden-yellow flame.
• Sodium($\mathrm{Na}$) metal shows a yellow flame on burning in the presence of Oxygen(${\mathrm{O}}_2$) which on treatment with water gives a clear solution$\underset{\mathrm{Sodium}}{4\mathrm{Na}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Sodium}\mathrm{oxide}}{2{\mathrm{Na}}_2\mathrm{O}\left(\mathrm{s}\right)}$
• Sodium oxide(${\mathrm{Na}}_2\mathrm{O}$) upon treatment with water liberates Oxygen giving a clear solution.
  $\underset{\mathrm{Sodium}\mathrm{oxide}}{2{\mathrm{Na}}_2\mathrm{O}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Sodium}\mathrm{hydroxide}}{4\mathrm{NaOH}\left(\mathrm{aq}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}$

The reaction of sodium metal with oxygen gives a golden-yellow flame.