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Chemistry

Chemistry
The metal ion present in Vitamin B12 is

Zinc
Iron
Nickel
Cobalt

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Chemistry
What is the atomic number of Oxygen

22
12
5
8

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Chemistry
Which one of the following is most acidic

MgO
Al22O3
Na2O
CaO

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Chemistry
The chemical formula of the laughing gas is

NO
N2O
N2O3
NO2

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Chemistry
The components of water can be separated by

Physical methods
Chemical methods
Both A and B
They can not be separated

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Chemistry
The chemical used for cloud seeding for artificial rains is

Silver Nitrate
Potassium Bromide
Potassium Nitrate
Silver Iodide

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