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General Science

General Science
How many colours the sunlight spectrum has?

Five
Three
Seven
Four

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General Science
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

Helium
Argon
Xenon
Krypton

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General Science
Which of the following is used in pencils?

Graphite
Phosphorous
Silicon
Charcoal

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General Science
Which layer protects earth from harmful rays of the Sun?

Ozone layer
Ionosphere
Troposphere
Magnetosphere

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General Science
What are metal bearing rocks called?

Bitumen
Bauxite
Metalloids
Ores

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General Science
The wavelength of X-rays is of the order of

10 micron
1 cm
1 angstrom
1 m

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