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Question

Which forces of attraction are responsible for liquefication of He gas?

A
Coulombic forces
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B
Dipole forces
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C
Hydrogen bonding
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D
van der Waals forces
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Solution

The correct options are
A van der Waals forces
C Dipole forces
Vanderwaal forces and Dipole forces of attraction are responsible for liquefaction of He gas.These two force of attractions are operated between atoms of He.
Hence option B and D are correct.

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