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Chemistry

Chemistry
Magnetite is

Fe3O4
Fe2O3
2Fe2O3. 3H2O
FeCO3

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Chemistry
The strongest acid of the following is

M-nitrophenol
P-nitrophenol
O-nitrophenol
P-chlorophenol

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Chemistry
Which gas is most stable at room temperature

O2
F2
H2
N2

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Chemistry
Galvanization is the :

Deposition of zinc on iron
Deposition of copper on iron
Deposition of aluminium on iron
Deposition of tin on iron

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Chemistry
Atoms of same element having different mass numbers are called________

Isotopes
Isobars
Isotones
Isomers

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Chemistry
In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins?

Iron
Titanium
Aluminium
Copper

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