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Chemistry

Chemistry
Major gaseous pollutant of the thermal power station is

NH3
NO2
H2 S
SO2

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Chemistry
Which metal is the heaviest in periodic table among the following ?

Pb
Os
W
Pt

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Chemistry
Which one of the following is not a fertilizer?

Ammonium sulphate
Potassium nitrate
Calcium ammonium nitrate
Calcium sulphate

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Chemistry
Conduction band electrons have more mobility than holes because they

Experience collision less frequently
Are lighter
Need less energy to move them
Have negative charge

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.201
0.158
0.273
0.323

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Chemistry
The metal that is used as a catalyst in the hydrogenation of oils is

Cu
Pb
Pt
Ni

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