The process which allows insoluble particle to settle down in a solution is called
You have been given a mixture of iron fillings, sand and sugar. You have to separate them by
(i) use of magnet
(ii) making solution with water
Q. What will be correct sequence
A cold drink bottle mouth was capped with a balloon. Which action can lead to increase in the size of balloon?
Which of the following statements is true?
(i) Chlorination makes the water safe for drinking
(ii) Chlorinated water is made by distillation
(iii) Water must be boiled for at least 10 minutes to make it fit for drinking
(iv) Potassium paramagnet is also used to kill germs in water
Which of the following protect us from harmful rays of sun?
Oxygen is needed in which process?
Air pressure is measured with an instrument, called
Which of the following changes can be possible by heating?
Which of the following is not used for making drinking water?
Ozone layer protects us from