What is sludge ? Explain how it is treated ?

What is Venturi-meter? Explain how it is used.

What is scattering ? Explain how a light scatters.

what is genetic drift? Explain how it provides diviersity in the population. ?

What is torricelli'slaw? Explain how the speed of efflux is determined with an experiment.

What is valency of an atom? Explain how an atom can achieve an octet in their outermost shell and also explain how an atom can be chemically stable.

What do you mean by electric shock ? Explain how it takes place.