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Chemistry

Chemistry
Nucleus of an atom consists of.

Proton
Electron, Proton and Neutron
Neutron
Proton and Neutron

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Chemistry
Which substance is used to retard the setting action of cement?

Al2O3
CaSO4, 2H2O
Na2O + K2O
CaO

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Chemistry
The element absorbed both in cation and anion form is

Nitrogen
Sulphur
Calcium
Phosphorus

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Chemistry
Conduction band electrons have more mobility than holes because they

Need less energy to move them
Are lighter
Have negative charge
Experience collision less frequently

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Chemistry
The inert gas used as beacon light is

Ar
Kr
Ne
He

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Chemistry
Which of the following is not a nucleon?

Neutron
Proton
Electron
Positron

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