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Chemistry

Chemistry
Which one element has the lowest electronegativity value

Chlorine
Francium
Radium
Fluorine

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Chemistry
Which one of the following metals does not react with water to produce Hydrogen ?

Lithium
Sodium
Cadmium
Potassium

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Chemistry
Aspirin is

Acetyl Salicilic acid
Phenyl Salicilate
Methoxy benzoic acid
Methyl Salicilate

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

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

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Chemistry
Who developed Hydrogen Bomb?

Wernher Von Braun
Samuel Cohen
J. Robert Oppen Heimer
Edward Teller

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Chemistry
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in

Emission spectra
Raman spectra
Fluorescence
Absorption spectra

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