What happens when:
(i) Lead nitrate is heated
(ii) crystals of $F e S O_{4}$ are heated ?

Open in App

Solution

$(i) When lead nitrate$ $[P b (N O_{3})_{2}]$ $is heated, it forms lead oxide. The emission of brown fumes is also observed.$ $These brown fumes are of nitrogen dioxide$ $(N O_{2}) .$

$The reaction that takes place is:$
$P b (N O_{3})_{2} + h e a t \to 2 P b O + 4 N O_{2} + O_{2}$

$The above reaction is an example of a decomposition reaction in which single reactant breaks down to give simpler$ $products.$

$(ii) When green crystals of ferrous sulphate$ $[F e S O_{4}]$ $are heated, the crystals lose water and the colour of crystal$ $changes. It then decomposes to ferric oxide$ $[F e_{2} O_{3}],$ $sulphur dioxide, and Sulphur dioxide.$

$The reaction that takes place is:$
$F e S O_{4} + h e a t \to F e_{2} O_{3} + S O_{2} + S O_{3}$

$The above reaction is also an example of a decomposition reaction.$

Suggest Corrections

Similar questions

P C l_{5}

H_{3} P O_{3}

State what will you observe when lead nitrate crystals are heated in a dry test tube.

What happens when crystals of copper nitrate is heated? (write balanced chemical equation)

Join BYJU'S Learning Program