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CHEMISTRY

Chemistry
Among the following, carbonate ore of Zinc is

Zincblende
Calamine
Sphalerite
Zincite

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Chemistry
The metal used for making aircrafts and rockets is

Copper
Lead
Nickel
Aluminium

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

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

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Chemistry
The length of double bond is _______ than single bond

None of these
Longer
Shorter
Of same lenght

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Chemistry
An example of heterocyclic compound is

Furan
Naphthalene
Benzene
Anthracene

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