Question

effect of heat on Red lead class 9 practical ​

Answer 1

Answer:

Explanation:

Solution:-

Equations for effect of heating on-  

red lead-

(Red lead)

2Pb  

3

​  

O  

4

​  

 

​  

 

Δ

​  

6PbO+O  

2

​  

 

lead dioxide-

(Lead dioxide)

2PbO  

2

​  

 

​  

 

Δ

​  

2PbO+O  

2

​

Answer 2

Answer:

hope this helps!

Explanation:

physical appearance bright orange or red (maybe crystalline or amorphous depending on sample)

on heating lead oxide and oxygen is given out so the description would be:

no change in color and a colourless odourless gas is given out

a glowing splinter relights indicating that the gas is a supporter of combustion

no change in red or blue litmus paper indicating that the gas is neutral thereore we can conclude that the gas is oxygen

nature of residue is pale yellow therefore it is PbO

substance given is Pb3O4

gas evolved is O2

residue is PbO

Physical appearance is orange and microcrystalline

equation of reaction is 2Pb3O4 -----> 6PbO + O2