' बिजली ' शब्द का

The instrument used to measure the speed of the wind is –

One can distinguish a telescope from a microscope by observing –

Addition of ethylene dibromide to petrol 

What is the SI unit of electric charge?

A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be -

1 mole of carbon atoms = ______ g of carbon atoms

Which of the following is Vitamin-E?

What are diatoms?

Which one of these is not a property of conservative force?

Who discovered the cell for the first time?