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Chemistry

Chemistry
The most electronegative element among the following is

sodium
oxygen
fluorine
bromine

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Chemistry
Burning pyrites ore gives out

Nitric oxide gas
Carbon dioxide gas
Sulphur dioxide gas
Nitrogen dioxide gas

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Chemistry
In a Carbonyl group a carbon atom makes double bond with

None of these
Oxygen
Carbon
Hydrogen

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Chemistry
Which one of the following is most acidic

Al22O3
Na2O
MgO
CaO

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Chemistry
Concentration of a material which is lethal to 50% animal is called

LD50
ADI
NOAEL
LC50

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Chemistry
The percentage of Nitrogen in Air is

85.02
0.03
0.94
78.03

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MORE MCQ ON Chemistry

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