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Chemistry

Chemistry
The metal present in vitamin B12 is

Fe
Co
Mg
Mo

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Chemistry
The material known in commerce as Terylene is a

Blend of cotton and silk
Modified natural fibre
Natural fibre
Synthetic fibre

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Chemistry
The material used in solar cells contains

Caesium
Tin
Silicon
Thallium

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Chemistry
The advantage of detergents over soaps is

Soaps give lather with only soft water
Detergents are soluble in water
Detergents could not give much lather
Detergents give lather even with hard water

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Chemistry
The scientist who experimentally proved the existance of positron is

Fermi
Bohr
Bethe
Anderson

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Chemistry
The fundamental particles present in the nucleus of an atom are

Proton, neutron
Neutron, positron
Neutron, electron
Electron, proton

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