PREVIOUSLY ASKED IN:
WBPSC Miscellaneous Preliminary 2023
Answer
Ethylene
Explanation
Ethylene (\( C_2H_4 \)) gas is commercially used for the artificial ripening of green fruits. It is a natural plant hormone that accelerates the ripening process. While calcium carbide produces acetylene gas which is also used for ripening, ethylene is the globally recommended and safer alternative for artificial ripening.
Key Points
- > Ethylene is the only natural gaseous plant hormone.
- > Chemical Formula: \( C_2H_4 \).
- > Calcium carbide reacts with moisture to release acetylene (\( C_2H_2 \)), which also ripens fruits.
- > Calcium carbide is banned in many countries due to severe health hazards.
- > Auxins promote stem elongation and growth.
- > Methane (\( CH_4 \)) is the primary component of natural gas.
- > Ethylene controls fruit ripening, flower opening, and leaf fall.
Additional Information
Plant Hormones
| Hormone | Main Function |
|---|---|
| Ethylene | Fruit ripening (Gaseous) |
| Auxin | Stem elongation, phototropism |
| Gibberellin | Seed germination, internode elongation |
| Cytokinin | Cell division, delays aging |
Memory Tips
- E for Eat: Fruits are ready to Eat when ripened by Ethylene.