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Chemistry

Chemistry
The metal present in vitamin B12 is

Fe
Mg
Co
Mo

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Chemistry
1 carat of diamond is equal to

100 mg
200 mg
200 g
100 g

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Chemistry
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water

Calcium
Manganese
None of these
Magnesium

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Chemistry
The monomers of dacron are

Ethylene glycol and terephthalic acid
Decane and decanol
Decanone and decanol
Ethylene glygol and phthalic acid

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Chemistry
The laws of electrolysis are given by

Ostwald
Faraday
Arrhenius
Lewis

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Chemistry
Which one of the following minerals is found in pure form?

Bauxite
Copper
Iron
Manganese

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