Chemistry
Iron and manganese present as pollutants in water cannot be removed by________

Ion exchange process
Chlorination
Oxidation followed by settling and filtration
Lime soda process or manganese zeolite process

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Chemistry
The lustre of the metals is because of

High density, due to closed packing of atoms
Reflection of light due to the presence of free electrons
High polish
Absorption of light due to the presence of cavities

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