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Chemistry

Chemistry
Charcoal is used in water treatment as a/an

Adsorbent
Absorbent
Coagulant
Solvent

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

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Chemistry
The trans-uranium elements are the chemical elements with atomic numbers greater than

92
86
89
96

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Chemistry
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

zero
5
2
4

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Chemistry
Which of the following is used to remove ink and rust stains on cloth?

Ether
Oxalic acid
Alcohol
Kerosene oil

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Chemistry
Which of the following is not an addition polymer

Nylon
Polystyrene
PVC
Polythene

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