Nitric acid does not react with
Gold
Copper
Zinc
Zinc
A.
Gold
All isotopes of the same element have .................
different atomic numbers and different atomic mass
different atomic numbers and the same atomic mass
the same atomic number but different atomic masses
the same atomic number but different atomic masses
Which of the following is not soluble in water?
Lead sulphate
Zinc sulphate
Potassium sulphate
Potassium sulphate
Silver gets corroded due to ................ in air.
Oxygen
Hydrogen Sulphide
Carbon dioxide
Carbon dioxide
Activated Charcoal is used to remove colouring matter from pure substances by .............
Bleaching
Oxidation
Adsorption
Adsorption
The chemical name of quartz is.................
Calcium oxide
Calcium phosphate
Sodium phosphate
Sodium phosphate