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Chemistry

Chemistry
Among the following, carbonate ore of Zinc is

Zincite
Calamine
Zincblende
Sphalerite

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Chemistry
Which is the purest commercial form of iron ?

Pig iron
Steel
Wrought iron
Stainless steel

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Chemistry
The gas used for artificial ripening of green fruit is

acetylene
carbon dioxide
ethylene
ethane

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Chemistry
Chemical properties of isotopes

Need not be same
Must be different
Need not be different
Must be same

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Chemistry
Milk is

Suspension
Emulsion
Foam
Gel

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Chemistry
Which is the purest form of iron?

Wrought iron
Pig iron
Cast iron
Steel

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