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CHEMISTRY

Chemistry
The maximum number of isomers for an alkene with molecular formula C4H8 is

2
4
5
3

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Chemistry
The hardest form of carbon is

graphite
coke
charcoal
diamond

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Chemistry
The most important ore of aluminium is

bauxite
monazite
magnetite
haematite

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Chemistry
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

an addition reaction
a condensation reaction
an elimination reaction
an oxidation reaction

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Chemistry
The number of electrons presents in H+ is

zero
two
three
one

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