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Chemistry

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

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

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

Catalytic converters in industry
More efficient car engines
Static electricity to attract it in factory chimneys
Low - sulphur fuels

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Chemistry
Phosphorus is kept in water because

Its ignition temperature is very high
Its critical temperature is low
Its ignition temperature is very low
Its critical temperature is high

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Chemistry
One carat of diamond is equal to

150 mg
250 mg
200 mg
100 mg

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Chemistry
Which of the following vegetable oils does not contain essential fatty acids ?

Coconut oil
Mustard oil
Sunflower oil
Groundnut oil

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Chemistry
Total number of naturally occurring elements

62
92
110
98

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