The percentage of oxygen in air is approximately –

Related MCQs

• The percentage of Nitrogen in Air is -
• Oxygen which is vital for life is a product of photosynthesis and comes from –
• Where does the oxygen that keeps us alive come from?
• An inert gas mixed with oxygen given to patients suffering from restricted breathing is –
• Which of the following gases is mixed with oxygen for breathing by divers in aqualungs?
• Which of the following metals does NOT react with oxygen even at a high temperature?
• The gas used to dilute oxygen for breathing by deep sea divers is-
• The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
• Which one of the following mineral does not contain oxygen?
• Which among the following is used to dilute oxygen in the gas cylinders used by divers?