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Chemistry

Chemistry
What is the covalency of nitrogen in ammonia molecule

5
3
2
4

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Chemistry
Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition

Rotational spectroscopy
UV photoelectron spectroscopy
Infrared absorption spectroscopy
UV absorption spectroscopy

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Chemistry
A powerful eye irritant present in smog is

Nitric oxide
Carbon dioxide
Peroxyacetyl nitrate
Sulphur dioxide

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Chemistry
Of the following compounds of calcium, the one having highest covalent character is

CaF2
Cacl2
CaBr2
Cal2

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Chemistry
Iron is extracted from

Bauxite
Dolomite
Cinnabar
Haematite

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Chemistry
Which of the following is used for refrigeration?

Freon
Phosphine
Chlorine
Sulphur dioxide

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