What are the three methods in which a body can be charged?

Three methods in which transfer of heat can be done

Name the three methods by which hydrous substances can be made anhydrous.

Name the method by which alkali metals can be extracted.

What are the three methods of removing germs from natural water? Explain.

State any two methods by which ordinary light can be polarised.

In which situation a body can roll

Which of the ores mentioned in table in Table can be concentrated by magnetic separation method?

Two methods by which liquid can change into vapour

What is meant by coagulation of a colloidal solution ? Describe briefly any three methods by which coagulation of a lyophobic sol can be carried out.

Method by which lyophobic sol can be protected-