Physics
For an ideal gas, which one of the following statements does not hold true?

There is no interactive force between the molecules.
The kinetic energies of all gas molecules are not same
The potential energy of the gas molecules is zero
The speed of all gas molecules is same

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Physics
An egg sinks in soft water but floats in a concentrated solution of salt because

Egg absorbs salt from the solution and expands
Water has high surface tension
The density of salt solution exceeds the density of eggs
Albumin dissolves in salt solution and egg becomes lighter

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