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Chemistry

Chemistry
The most electronegative element among the following is

oxygen
sodium
fluorine
bromine

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Chemistry
Which of the following is a monoatomic gas?

Neon
Oxygen
Fluorine
Nitrogen

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Chemistry
Which one of the following contains maximum percentage of carbon ?

High speed steel
Wrought iron
Stainless steel
Cast iron

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Chemistry
The major constituent of gobar gas is

Carbon dioxide
Isobutane
Methane
Butane

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Chemistry
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

NO2
SO2
SO3
N2O

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Chemistry
The pH of human blood is between :

44052
4.5-5
6.5-7
7.5-8

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