Question

State the colour of:


- The residue when hydrated copper sulphate crystals are heated


-The flame when flame test is performed with potassium nity


- The residue when lead nitrate is decomposed on heating



please answer it fast its an urgent ​

Answer 1

Answer:

:when lead nitrate is decomposed, it gives oxide,

nitrogendioxide and oxygen

:potassium give purpil and boiler color

may be this will help uui

Answer 2

The color of the desired substances produced from the given reactions are as follows :

• The color of the residue obtained upon heating hydrated copper sulfate is white.Hydrated copper sulfate is blue in color which on losing its water of crystallization turns white.
• The flame has a lilac(purplish kind of) color.The color of the flame is due to the electronic transition taking place on heating potassium ion.
• The color of the residue is yellow.Lead nitrate on heating produces the residue as lead oxide and nitrogen dioxide and oxygen are evolved.