Question

take two similar Green Leaves apply grease on one leaf and leave the other free add one or two drops of acid on each leaf. what kind of change do you observe from this

Answer 1

A. 1) Take two similar green leaves.
2) Grease one leaf with petroleum jelly, leave the other free.
3) Add 1 or 2 drops of some weak acids on both the leaves.
4) Observe them after half-an-hour or so and write your observations.
5) The leaf to which petroleum jelly was not applied effected by the acid.
6) We observe the colour of the leaf changes.
7) The other leaf was not affected by the acid because of petroleum jelly.

Answer 2

Explanation:

In the experiment, the green leaf was applied with the grease which is a lipid hydrophobic molecule and on the other leaf, no grease is applied to demonstrate the role of mucus in the protection of the stomach.

• When the HCl acid was applied to both the leaves, it was observed that the leaf applied with grease is not affected by the acid but the leaf without the grease will be affected with the acid.
• This easily demonstrates that the presence of mucus in the stomach helps in the protection of the stomach from the hydrochloric acid produced by the parietal cell.

To learn more:  

1. Role of mucus:  https://brainly.in/question/1631531

1) The leaf to which grease is applied is not effected with the acid. .Inne 2b 16]

2) The leaf to which grease is not applied is effected.

3) From the above activity we can conclude that mucus secreted by the walls of stomach protect it from the harmful effects of hydrochloric acid in the stomach.