Which of the following statement(s) concerning ethephon is/are true?
I. It is commercially used to ripen fruits
II. It is the source of ethylene
III. Plants can easily absorb and transport ethephon in solution

Q. Assertion :The most widely used compound as source of ethylene is ethephon. Reason: Ethephon hastens fruit ripening in tomatoes and apples and accelerates abscission in stems and leaves.

Q. Very short answer type.
For what purpose ethephon (the commercial product, liquid ethylene) is used?

Q. Which the following commercial application of phytohormones are correct?
A. Auxins are extensively used in agriculture to promote flowering in pineapples.
B. Ethephon is used for promoting female flower in cucumbers, thereby increase the yield.
C. Abscisic acid is of great use in the ripening the fruits like mango, orange, pineapple etc.
D. Cytokinins are used for keeping freshness in leafy and green vegetables.

Q. Consider the statements A -D.
A. Ethephon is widely used in agriculture for the source of ethylene.
B. Auxin stimulates the stem to bent towards the source of light.
C. Carbohydrates are produced in mature leaves and transported to other plants parts.
D. Gibberellins promote the growth of plumule and radicle in seed germination.

Q. Calcium carbide is also used for ripening fruit artificially in some countries. Calcium carbide reacts with water to produce acetylene, which acts as an artificial ripening agent. Industrial-grade calcium carbide may contain traces of arsenic and phosphorus which makes it a human health concern Consider the following statements about acetylene
(a) It is used in welding industry
(b) It is a raw material for preparing plastics
(c) It is easily obtained by mixing silicon carbide and water
of these statements