Give reasons :
A closed can containing dried seeds bursts open, if some water enters it accidentally.

Give reasons : Ice floats on water.

Give reasons : On boiling, water loses its taste.

Give reasons : (a) When a stone is dipped in a glass containing some water, the level of water rises but when a spoon of sugar is added to it and stirred, the water level does not rise. (b) A drop of ink added to water in a glass turns the whole water blue.

Give reasons A mixture of dilute NaOH and aluminium pieces is used to open drain.

Give reasons for the following: Aluminium containers are used as packaging containers.

Give reason for the following: Purified and dried hydrogen is collected over mercury

Give reasons : Water droplets can be seen outside a chilled water bottle.

Give reasons for the following facts: Dry seeds do not germinate.

Give reasons for the following facts: Dry seeds do not germinate.

Give reasons Hybrid seeds should be raised every year.