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Chemistry

Chemistry
The number of neutrons present in an element having mass number 226 and atomic number 88 is :

138
88
50
314

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Chemistry
Soap helps in better cleaning of clothes because

It reduces the surface tension of solution
It absorbs the dirt
Soap acts like catalyst
It gives strength to solution

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Chemistry
Which of the following molecules has a bond order of 2.5

NO
HCL
CO
F2

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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
Silicon is used in

All of these
Transistors
Solar energy devices
Semiconductors

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Chemistry
Which of the following is very reactive and kept in kerosene?

Potassium
Iodine
Sodium
Bromine

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