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Chemistry

Chemistry
The metal does not give H2 on treatment with dilute HCL is

Zn
Fe
Ca
Ag

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Neon
Nitrogen
Helium
Argon

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

N3- > O2- > F- > Na+
Na+ > O2- > N3- > F-
O2- > F- > Na+ > N3-
N3- > Na+ > O2- > F-

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Chemistry
For extinguishing fire, we use

Carbon Dioxide
Hydrogen
Carbon Monoxide
Marsh gas

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Chemistry
Indane gas is mixture of

Butane and oxygen
Butane and hydrogen
Methane and oxygen
Butane and propane

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Chemistry
Which of the following is used as anesthetic ?

N2O
NO2
NH3
NO

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