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Chemistry

Chemistry
In which of the following substances all carbon atoms are quaternary in nature ?

Diamond
Graphite
Teflon
Napthalene

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Chemistry
Which one of the following is used as preservative for foodstuff ?

Sodium Benzoate
Picric acid
Glycerine
Sodium Chloride

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Chemistry
The depletion of Ozone layer is mainly due to

Chlorofluorocarbons
Radioactive rays
Aviation fuels
Volcanic eruptions

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Chemistry
In the periodic table of elements, on moving from left to right across a period, the atomic radius

Decreases
Increases
Remains unchanged
Does not follow a definite pattern

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Chemistry
Which of the following acts as promoter for iron in Haber's process

Mo
W
Mn
Mg

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Chemistry
Which among the following metals provides amphoteric oxide ?

Silver
Sodium
Aluminium
Calcium

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