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Chemistry

Chemistry
A detergent is a

Cleansing agent
Catalyst
Soap
Drug

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Chemistry
Atoms of same element having different mass numbers are called________

Isotopes
Isotones
Isomers
Isobars

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Chemistry
The material known in commerce as Terylene is a

Synthetic fibre
Natural fibre
Blend of cotton and silk
Modified natural fibre

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Chemistry
Which of the toxic heavy metals is found in modern tannery industries ?

Zinc
Lead
Chromium
Nickel

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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 –

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

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Chemistry
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

4.84 x 1017
6.023 x 1023
6.023 x 1019
1.568 x 103

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