Question

When crystals of lead nitrate are heated strongly in a dry test tube

(a) crystals immediately melt
(b) a brown residue is left
(c) white fumes appear in the tube
(d) a yellow residue is left​

Answer 1

Answer:

Lead nitrate ,when heated strongly in a dry test tube, it produces Lead oxide(PbO) , Nitrogen dioxide( NO2) and oxygen(O2). The lead nitrate is found to turn yellow due to the resultant product- lead oxide(PbO) and also there is evolution of a reddish brown gas which is nitrogen dioxide.

Answer 2

ANSWER

Option d

Explanation:

Lead nitrate ,when heated strongly in a dry test tube, it produces Lead oxide(PbO) , Nitrogen dioxide( NO2) and oxygen(O2). The lead nitrate is found to turn yellow due to the resultant product- lead oxide(PbO) and also there is evolution of a reddish brown gas which is nitrogen dioxide.