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Chemistry

Chemistry
The length of double bond is _______ than single bond

Of same lenght
Longer
Shorter
None of these

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

N3- > Na+ > O2- > F-
N3- > O2- > F- > Na+
Na+ > O2- > N3- > F-
O2- > F- > Na+ > N3-

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Chemistry
In galvanization, iron is coated with

Zinc
Copper
Tin
Nickel

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Chemistry
Non-stick kitchenwares are coated with

Graphite
Teflon
Silicon
PVC

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Chemistry
Which amidst the following is not a gem stone ?

Cat's-eye
Pearl
Opal
Topaz

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Chemistry
Atomic number is the number equal to

Neutrons
Protons
None of these
Electrons

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