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
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18
Answer
The correct answer is (D) A yellow residue is left.
The reaction is given as follows:
heat
2Pb(NO3)2--------->2PbO+4NO2+O2
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.
Answered by
2
The correct option is d.
- When crystals of lead nitrate are heated strongly in a dry test tube lead oxide along with nitrogen dioxide and oxygen is formed.
- The reaction is-
- In this reaction, a yellow residue of PbO is left and a brown coloured gas nitrogen dioxide is evolved.
- Thus the correct option is d) a yellow residue is left.
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