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CHEMISTRY

Chemistry
Among the following, carbonate ore of Zinc is

Sphalerite
Zincite
Zincblende
Calamine

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Chemistry
The metal used for making aircrafts and rockets is

Aluminium
Copper
Nickel
Lead

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Chemistry
The compound that has the least value for octane number is :

N-heptane
2,2-dimethyl hexane
Iso-octane
2-methyl heptane

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Chemistry
The length of double bond is _______ than single bond

None of these
Of same lenght
Longer
Shorter

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Chemistry
An example of heterocyclic compound is

Furan
Naphthalene
Anthracene
Benzene

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