Give reason for the following case:
It is easier to swim in sea water than in river water.

Give reasons for the following observations. CH_3COOH is weaker than HCOOH

There are different type of forces in nature.We learnt their effects and applications.Give the exact reason for the following. Why is it easy to lift a heavy stone in water?

Write reason for the following: Soft water lathers with soap but not hard water.

Find out the reasons for the following. Though an egg sinks in pure water,it floats on salt water.

Give reason for the following. a) Iron vessels are not used as boilers that are used to boil water. b) Blue vitriol solution is not kept in iron vessels.

Give reasons for the following: Iron vessels are not used a boilers that are used to boil water.

Account for the following observations: i) The density of ice is lower than that of water. ii) Hard water doesn't give ready lather with soap.

Find out the reasons for the following. Kerosene floats on water.

Find out the reasons for the following. A ship floats on water.