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Chemistry

Chemistry
The most important ore of aluminium is

magnetite
monazite
bauxite
haematite

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Chemistry
The Refrigerant 'FREON' is

Calcium Tetra Fluoride
Difluoro Dichloro Methane
Fluorspar and Felspar
Hydrofluosilicic Acid

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Chemistry
Which of the following elements is found in all organic compounds

Nitrogen
Carbon
Calcium
Oxygen

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Chemistry
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

4.05 gram
3.05 gram
2.05 gram
5.05 gram

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

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

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Chemistry
Haloarenes are more stable than haloalkanes due to

Resonance effect
All of them
Inductive effect
Hyper conjugative effect

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