How is chlorine obtained in the laboratory ? How does it react with the following ?
excess `NH_(3)`

Explanation

Chlonne is prepared in the laboratory-by heating concentrated Hydrochloric acid with Manganese dioxide, `Mn0_(2) + 4HCI rarr MnCI_(2) + CI_(2) + 2H_(2)O`
It can also be prepared by heating a mixture of sodium chloride and concentrated `H_(2)S0_(4)` .
`4NaCI + Mn0_(2) + 4H_(2)S0_(4) rarr MnCI_(2) + 4NaHS0_(4) + 2H_(2)0 + CI_(2)`
Reactions:
Chlorine gives nitrogen and ammonium chloride. with excess . ammonia.
`8NH_(3) + 3CI_(2) rarr 6NH_(4)CI+ N_(2)`