Question

Joseph Priestly performed the famous bell jar eperiment to prove that

• A. Plants consume oxygen
• B. Plants consume canbon dioxide
• C. Plants produce oxygen
• D. Plants produce carbon dioxide

Answer 1

The correct option is C Plants produce oxygen

Joseph Priestly was the first person to show that plants produce oxygen. He demonstrated this by performing the classic bell jar experiments.
He demonstrated that when a candle was lit under a bell-jar, it would be put out in a while unless it is placed along with a green plant. Thus he showed that the green plants produced something that keeps the candle lit, which was later discovered to be oxygen.