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Chromium and nickel
Zinc and sulphur
Potassium and mercury
Strontium and barium
Saturated hydrocarbons have
Seaweeds are important source of
Silicone is a polymer of
Silk fibre chemically is :
Silver gets corroded due to _ in air.
Smog is
Smoke is a colloidal dispersion of a
Sodium bicarbonate is commercially known as
Sodium carbonate crystal lose water molecules this property is called
Sodium Carbonate is commonly known as