Question

For experiment showing that $C{O}_2$ is evolved during the process of respiration in plants - arrange the steps sequentially.

i) Soak gram seeds in water, overnight. Keep them in conical flask.
ii) Close the conical flask with cork fitted with 'U' tube.
iii) Insert test tube with KOH solution in the conical flask.
iv) Keep the set steady for some time.

• A. i,ii,iii,iv
• B. i,ii,iv,iii
• C. i,iii,ii,iy
• D. i,iii,iv,ii

Answer 1

The correct option is A i,ii,iii,iv

Germinated gram seeds in a conical flask release carbon dioxide during respiration. The carbon dioxide released is absorbed by KOH present in the hanging test tube in a conical flask. This creates a vacuum in the conical flask which causes upward movement of water in the delivery tube leading to a change in the level of water in the delivery tube.

So, the correct answer is A.