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Chemistry

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

Uric Acid
Urea
Ammonia
None of these

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Chemistry
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

From brown to orange-red
From blue to pink
From pink to blue-green
From brown to blue-black

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Chemistry
The depletion of ozone layer is due to

Chloro fluoro carbon
Ethane
Sulphur dioxide
Carbon dioxide

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Chemistry
Which among the following elements is found in maximum percentage in the human body ?

Carbon
Nitrozen
Hydrogen
Oxyzen

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Chemistry
Nylon is made up of :

Polypropylene
Polyester
Polyethylene
Polyamide

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Chemistry
If we burn graphite,

Residue will be left
It will not burn
No residue will be left
It will change into diamond

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