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Chemistry

Chemistry
Silicon is a

Conductor
Semiconductor
Insulator
Nonconductor

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Chemistry
The number of waves in n x 10th Bohr's orbit are

n3
n2
n
n-2

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Chemistry
The metal present in vitamin B12 is

Co
Mo
Fe
Mg

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Chemistry
Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?

All listed here
Pyrolysis and Gasification
Incineration
Landfills

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Chemistry
An inert gas mixed with oxygen given to patients suffering from restricted breathing is

Argon
Helium
Krypton
Radon

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Chemistry
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

hydrogen
carbon
oxygen
nitrogen

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MORE MCQ ON Chemistry

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