Which type of wate is thrown in blue dustbins ?

Which gas is thrown out during our exhalation ?

List two items which can be easily recycled, but we generally throw them in the dustbins.

What type of energy is possessed : (a) by the stretched rubber strings of a catapult ? (b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult ?

Which of the following statement is true about wate hyacinth ?

Which of the following is blue?

Which of the following is not blue-green algae