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Chemistry

Chemistry
Sulphuric acid is

Tetrabasic
Tribasic
Dibasic
Monobasic

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Chemistry
Which of the following metals occurs in free state ?

Zinc
Copper
Lead
Iron

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Chemistry
Which of the following caused radioactive pollution along the coast of Kerala ?

Zinc
Radium
Thorium
Plutonium

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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 chief constituent of natural gas is:

Methane
Propane
Helium
Nitrogen

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Chemistry
Periodic table contains how many groups

19
18
17
16

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