Question

The nitrate which doesn't produce brown gas on heating is ? 1. KNO3 2. AgNO3 3. Hg(NO3) 2 4. MG(NO3) 2

Answer 1

hii here is your answer ,

1. kno3 will not produce brown fumes on heating because The nitrates of lithium, silver and most divalent and trivalent metals on heating decompose to give reddish brown fumes of nitrogen dioxide and oxygen as the gaseous products

be happy and live longer my friend

Answer 2

heyy bro ur answer.............

The nitrates of lithium, silver and most divalent and trivalent metals on heating decompose to give reddish brown fumes of nitrogen dioxide and oxygen as the gaseous products.

4LiNO3 = 2Li2O + 4NO2 + O2

2AgNO3 = 2Ag + 2NO2 + O2

Hg(NO3)2 = Hg + 2NO2 + O2

2Mg(NO3)2 = 2MgO + 4NO2 + O2

2Pb(NO3)2 = 2PbO + 4NO2 + O2

4Al(NO3)3 = 2Al2O3 + 12NO2 + 3O2

But the nitrates of sodium and other heavier alkali metals - potassium, rubedium and caesium - do not liberate NO2 on heating. They give only oxygen as the gaseous product and the respective nitrite is left as the solid residue.

2NaNO3 = 2NaNO2 + O2

2KNO3 = 2KNO2 + O2

Ammonium nitrate, a nonmetallic compound, decomposes to nitrous oxide (N2O, laughing gas) and water on heating.

so option 1 is answer.............hope this will help u..........@kundan