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CHEMISTRY

Chemistry
The most important ore of lead is

Galena
Siderite
Pyrolusite
Magnetite

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Chemistry
Which is the purest commercial form of iron ?

Steel
Pig iron
Stainless steel
Wrought iron

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Chemistry
The most abundant metal in the Earth’s crust is

Zinc
Iron
Aluminium
Copper

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Chemistry
The ore of Aluminium is

Fluorspar
Bauxite
Chalco pyrites
Hematite

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Aluminium
Type metal
Cast-iron
Water

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