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Solution


Q.

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.            [2021]
1 Noble gases have large positive values of electron gain enthalpy.  
2 Noble gases are sparingly soluble in water.  
3 Noble gases have very high melting and boiling points.  
4 Noble gases have weak dispersion forces.  

Ans.

(3)

Noble gases have very low melting and boiling points because the only type of interatomic interaction in these elements is weak dispersion forces.