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CHEMISTRY

Chemistry
Among the following, carbonate ore of Zinc is

Calamine
Zincblende
Sphalerite
Zincite

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Chemistry
The metal used for making aircrafts and rockets is

Lead
Nickel
Copper
Aluminium

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

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

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Chemistry
The length of double bond is _______ than single bond

Of same lenght
Shorter
Longer
None of these

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Chemistry
An example of heterocyclic compound is

Furan
Anthracene
Benzene
Naphthalene

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