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Chemistry

Chemistry
Sea weeds are important source of

Chlorine
Bromine
Iodine
Iron

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

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

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Chemistry
The length of double bond is _______ than single bond

Shorter
Longer
None of these
Of same lenght

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Chemistry
Which of the following contains high content of lead?

Cooking gas
High octane fuel
Low octane fuel
Coal

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Chemistry
The noble gas used in radiotherapy is

Xenon
Neon
Radon
Argon

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

Ca
Fe
Ag
Zn

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