Question

ans plZ
1.ii)
3.b)
7.b)​

Answer 1

Answer:

1.ii) Mercury is the metal used widely in amalgams

3.b)Blue salt of copper sulphate is hydrated salt.Formula is CuSO4.5H2O.the water molecules are responsible for blue colour.When it is heated it loses the water molecules and becomes anhydrous CuSO4.This is why it becomes colourless after heating.

7.b)

i) brass---copper and zinc

ii)bronze---copper and tin  but sometimes contains arsenic ,phosphorus,aluminium,etc

iii)solder----mostly tin but sometimes bismuth,cadmium and lead also

hope this helps

please mark my answer as brainliest