Chemistry, asked by aasheesh, 9 months ago

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

Answers

Answered by hykokcha
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 qwmagpies
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-
  • 2Pb(NO_3)_2\rightarrow 2PbO+4NO_2+O_2
  • 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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