Using the VSPER theory, the effect of lone pairs on molecular shape can be discussed.
There are 3 types of electron pairs present in a molecular shape: bond pair -bond pair, lone pair - bond pair, lone pair - lone pair.
Strength of repulsions between these three types of pair follows the order:
lone pair- lone pair > lone pair - bond pair > bond pair - bond pair
Whenever there is an addition of lone pairs to the geometry, some distortions take place which decreases the bond angles and some asymmetry is attained in the original molecular shape.
I think the correct answer would be false. <span>Gases do expand because they do not have an absolute volume. However, liquids do not expand to fill their container, they just fill and follows the shape of the container. Hope this answers the question.</span>
Pebble in a sling shot!! And I believe the boulder falling !