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Chemistry

Chemistry
Which one is the purest form of carbon

Diamond
Iron
Graphite
Coal

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Chemistry
Which one of the following chemicals helps in fruit ripening?

Atrazine
Malathion
Isoproturan
Ethephon

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Chemistry
Spirit in contact with body gives cool sensation because it is :

Transparent
Liquid
A good conductor
Highly volatile

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Chemistry
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?

Neon
Nitrogen
Sodium
Hydrogen

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Chemistry
Urea is a

Sodium fertilizer
Phosphatic fertilizer
Potassium fertilizer
Nitrogenous fertilizer

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Chemistry
Which of the following is used in dating archaeological findings ?

614C
92235U
13H
818O

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