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Chemistry

Chemistry
What material is used to make electric heater coil ?

Iron
Silver
Nichrome
Copper

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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
Avogadro's Law
Exclusion Principle of Pauli

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Chemistry
Who modified Bohr's theory by introducing elliptical orbits for electron path

Thomson
Rutherford
Hund
Sommerfeld

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Chemistry
Percentage of lead in lead pencils is

40
80
31-66

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Chemistry
The chemical name of quartz is

Calcium phosphate
Calcium oxide
Sodium phosphate
Sodium silicate

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Chemistry
Which among the following is a covalent compound ?

Magnesium fluoride
Calcium chloride
Sodium chloride
Carbon tetrachloride

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MORE MCQ ON Chemistry

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