Question

Give reason:

Some empty space is left in sealed wine bottles.

Answer 1

Some empty space is left in sealed wine bottles:

Reason:

1. A liquid has only a fixed volume.
2. It does not have a fixed shape.
3. That is why when a liquid is heated its volume expands.
4. To allow the thermal expansion in the liquid some space is left in sealed bottles of liquids like wine and medicinal liquids.
5. It provides a space for the thermal expansion of the liquid so that liquid can not flow out of the bottle.

Thus, to avoid the overflow of liquid from the bottle due to thermal expansion of liquid some empty space is left in sealed wine bottles.