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Chemistry

Chemistry
An electric iron has a heating element made of :

Zinc
Copper
Nichrome
Tungsten

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Chemistry
Which of the following is not a natural source of hydrocarbon?

Petroleum
Natural Gas
Mica
Coal

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Chemistry
An acid having basicity one is

Sodium phosphate
Phosphoric acid
Sodium dihydrogen phosphate
Disodium hydrogen phosphate

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Chemistry
The metal ion present in Vitamin B12 is

Iron
Nickel
Zinc
Cobalt

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Chemistry
Higher concentration of nitrogen dioxide in atmosphere air causes

Corrosion
Asphyxiation
Bronchitis
Cancer

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Chemistry
Which one of the following mineral does not contain oxygen ?

Bauxite
Haematite
Cryolite
Calcite

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MORE MCQ ON Chemistry

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