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Chemistry

Chemistry
The most volatile of the given liquids is

Liquid
Ether
Liquid He
Liquid NH3

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Decrease
Increase
Remain the same
May increase or decrease

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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 1019
6.023 x 1023
1.568 x 103

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Chemistry
The high reactivity of fluorine is due to

availability of d-orbitals
small size of fluorine atom
its high electro negativity
strong F - F bond

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Chemistry
Mark the compound which possess ionic, covalent and coordinate bonds.

NH4Cl
SO3
H2O
SO2

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Chemistry
The material used in solar cells contains

Caesium
Silicon
Tin
Thallium

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MORE MCQ ON Chemistry

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