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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Sulphur-di- oxide
Urea
Ammonia
Chlorine

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Chemistry
Which of the following is also used as a Bio fertilizer?

Ammonia
Uric Acid
None of these
Urea

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Chemistry
Name two elements that find wide application in transistor industry

Carbon and Platinum
Tungsten and Platinum
Silicon and Germanium
Iridium and Germanium

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 4
–3 to + 5
–3 to + 6
–3 to + 3

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Chemistry
The filter over which sewage is sprinkled is called as

Trickling filter
Intermittent sand filter
Percolating filter
Contact bed

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Chemistry
What is the atomic number of Oxygen

12
22
5
8

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