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General Science

General Science
Actinides are the elements with atomic numbers from

97 to 104
36 from 43
101 to 115
89 to 103

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General Science
The isotope of uranium capable of sustaining chain reaction is

U-235
U-245
U-238
U-239

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General Science
The hardest substance available on earth is

None of the listed here
Iron
Diamond
Gold

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General Science
Chemical formula for water is

NaA1O2
CaSiO3
H2O
None of the listed here

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General Science
Which of the following is an element?

Sapphire
Diamond
Emerald
Ruby

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General Science
Heavy water is

PH7
Rain water
Deuterium oxide
Tritium oxide

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