The bacteria that kill bacteria are called

Mechanical energy is converted into electrical energy by

What is the main factor of rust in iron?

Which of the following insecticides’ harmful effects came under media attention when health issues in Kerala were publicized?

Which of the following is desirable aim of Science Education at Primary Level?

Which of the following electromagnetic waves has the highest wavelength?

Penicillin is extracted from-

In an electric circuit, Rheostat is often used to change the _____ in the circuit.