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Chemistry

Chemistry
The material used in solar cells contains

Caesium
Silicon
Thallium
Tin

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Chemistry
The product, 9-nitroanthracene is obtained from anthracene by the action of

Nitric acid and acetic acid
Nitric acid and ethyl alcohol
Nitric acid and acetic anhydride
Nitric acid in excess

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Chemistry
Which metal does not undergo corrosion due to the formation of oxide layer?

Copper
Iron
Zinc
Aluminium

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Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

1
2
3
4

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Chemistry
The element absorbed both in cation and anion form is

Calcium
Nitrogen
Sulphur
Phosphorus

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Chemistry
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

Hund's rule of maximum multiplicity
Uncertainty Principle of Hiesenberg
Exclusion Principle of Pauli
Avogadro's Law

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