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Chemistry

Chemistry
Which of the following is ozone depleting pesticide ?

Methyl bromide
Benzene
Ethylene ozonide
D.T.

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

x/6
5x/36
7.2 x
5x

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Chemistry
The most extensive, commercially useful source of thorium as monazite sand occurs in India at

Orissa coast
Travancore coast
West Bengal coast
Gujarat coast

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Chemistry
Biofertilizers convert nitrogen to ________ .

Nitrates
Amino acids
Ammonia
Nitrogenase

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Chemistry
Methanoic and ethanoic acids can be distinguished by the action of

Tollen's reagent
NaOH
SOCl2
NaHCO3

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is costlier than tin
Zinc has a higher melting point than tin
Zinc is less reactive than tin
Zinc is more reactive than tin

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