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Chemistry

Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 6, 8, 4
2, 10, 8
2, 8, 8, 2
2, 8, 10

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Chemistry
Wax used for making candle is chemically a mixture of

Aliphatic hydrocarbons
Aromatic hydrocarbons
Aliphatic and aromatic hydrocarbons
Cyclic hydrocarbons

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

Copper
Aluminium
Zinc
Iron

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Chemistry
The main source of carbon monoxide is

Transportation
Industrial process
Solid waste disposal
Fuel combustion

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Chemistry
In which of the following substances all carbon atoms are quaternary in nature ?

Diamond
Graphite
Teflon
Napthalene

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Chemistry
Which of the following is the strongest base in aqueous solution ?

Ammonia
Diethylamine
Ethylamine
Triethylamine

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