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Chemistry

Chemistry
The most abundant metal in the Earth’s crust is

Iron
Copper
Aluminium
Zinc

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Chemistry
The material used in the manufacture of lead pencil is

Mica
Lead
Carbon
Graphite

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Chemistry
The gas involved in Bhopal incident was

Methyl isocyanide
Hydrogen sulphide
Methyl chloride
Nitrogen dioxide

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Chemistry
Catalytic converters are generally made from :

Transition metals
Carbon
Alkaline metals
Hydrogen

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Chemistry
Which of the following is the maximum number of electrons that can be present in M-shell?

2
8
18
32

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

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

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