How can you conserve electricity at home? Give four points.

What measures would you take to conserve electricity in your house?

Water can be conserved by

How can you obtain lampblack?

How can you keep the heart healthy? Explain.

How can you check whether the electric potential in a given region of space has constant value ?

How can you obtain lamp black?

How can you charge gold leaf electroscope positively by conduction ?

How can you convert potassium dichromate into chromyl chloride ? Give equations for the reactions involved.

How can you relate pitch and frequency?

How will you convert ethane into ethanol? Give the chemical reaction involved.