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Chemistry

Chemistry
The scientist who experimentally proved the existance of positron is

Anderson
Fermi
Bohr
Bethe

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Chemistry
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is

19
17
53
36

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Chemistry
Glycol is used to manufacture which of the following ?

Nylon
Artificial silk
Rubber
Terylene

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Chemistry
Cement containing excess amount of lime

Is quick setting
Cracks during setting
Becomes more strong
Is slow setting

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Chemistry
Which one of the following is also known as solution ?

A compound
A suspension
A homogeneous mixture
A heterogeneous mixture

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Chemistry
The high reactivity of fluorine is due to

small size of fluorine atom
strong F - F bond
its high electro negativity
availability of d-orbitals

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