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Chemistry

Chemistry
The metal ion present in Vitamin B12 is

Cobalt
Iron
Zinc
Nickel

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Chemistry
Normal rainwater has a pH level of

8.3
5.6
3.2
6.3

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Chemistry
The purest form of Iron is :

Pig iron
Steel
Wrought iron
Cast iron

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Chemistry
Which gas is used for converting vegetable oils into saturated fats ?

O2
H2
Cl2
SO2

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Chemistry
In galvanization, iron is coated with

Tin
Copper
Zinc
Nickel

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Chemistry
An inert gas mixed with oxygen given to patients suffering from restricted breathing is

Radon
Argon
Helium
Krypton

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