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Chemistry

Chemistry
Biofertilizers convert nitrogen to ________ .

Amino acids
Nitrates
Ammonia
Nitrogenase

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Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

s-electrons in Mg(Z = 12)
p-electrons in Ne(Z = 10)
p-electrons in CI(Z = 17)
d-electrons in Fe(Z = 26)

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Chemistry
Aluminium salt commonly used to stop bleeding is

Aluminium nitrate
Aluminium Chloride
Aluminium sulphate
Potash alum

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Chemistry
The chemical substance present in bones and teeth is

Calcium phosphate
Calcium borate
Calcium sulphate
Calcium chloride

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Chemistry
The presence of Cobalt in Vitamin B12 was established for the first time by

Spectroscopy
Borax-Bead test
Hydrolysis test
Sodium Nitroprusside test

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Chemistry
The material which can be deformed permanently by heat and pressure is called a

polymer
thermoplastic
thermoset
chemical compound

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