With reference to the process of "Retting" (implied in Jute processing), consider the following statements: 1. It involves immersing stems in water. 2. It prevents the stems from rotting. 3. It helps in the separation of fibres. Which of the statements given above is/are correct?

Correct Option The correct option is (c) 1 and 3 only. Explanation Retting is a biological process employed in the processing of bast fibres like jute, flax, and hemp. It relies on the action of moisture and microorganisms (bacteria and fungi) to dissolve the cellular tissues and gummy substances (primarily pectin) that bind the fibre bundles to the stem. Statement-wise Analysis - Statement 1 is Correct: The most common method of retting involves bundling the harvested jute stems and immersing them in slow-running or stagnant water (such as ponds or tanks) for a specific period (usually 8 to 30 days). This provides the necessary moisture and environment for microbial action. - Statement 2 is Incorrect: Retting does not prevent rotting; rather, it is a process of controlled rotting or fermentation. The microorganisms decompose the soft tissues and pectin surrounding the fibres. If the stems did not undergo this partial decomposition, the fibres would remain stuck to the woody core. However, care is taken to stop the process before the fibres themselves rot. - Statement 3 is Correct: The primary objective of retting is to loosen the bond between the fibre bundles and the inner woody core (stick). Once the pectin is dissolved, the fibres can be easily separated and extracted from the stem through washing and stripping. Key Takeaway Retting is a microbial fermentation process that utilizes water and bacteria to decompose the pectin binding agents in plant stems, facilitating the extraction of commercial fibres like jute.

With reference to the process of "Retting"… - NCERT Class 6 Science MCQ

NCERT Class 6 Science — Chapter 1: Fibre to fabric

mcqmedium

With reference to the process of "Retting" (implied in Jute processing), consider the following statements:

It involves immersing stems in water.
It prevents the stems from rotting.
It helps in the separation of fibres.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 6 · Page 20

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c) 1 and 3 only.

Explanation

Retting is a biological process employed in the processing of bast fibres like jute, flax, and hemp. It relies on the action of moisture and microorganisms (bacteria and fungi) to dissolve the cellular tissues and gummy substances (primarily pectin) that bind the fibre bundles to the stem.

Statement-wise Analysis

Statement 1 is Correct: The most common method of retting involves bundling the harvested jute stems and immersing them in slow-running or stagnant water (such as ponds or tanks) for a specific period (usually 8 to 30 days). This provides the necessary moisture and environment for microbial action.
Statement 2 is Incorrect: Retting does not prevent rotting; rather, it is a process of controlled rotting or fermentation. The microorganisms decompose the soft tissues and pectin surrounding the fibres. If the stems did not undergo this partial decomposition, the fibres would remain stuck to the woody core. However, care is taken to stop the process before the fibres themselves rot.
Statement 3 is Correct: The primary objective of retting is to loosen the bond between the fibre bundles and the inner woody core (stick). Once the pectin is dissolved, the fibres can be easily separated and extracted from the stem through washing and stripping.

Key Takeaway

Retting is a microbial fermentation process that utilizes water and bacteria to decompose the pectin binding agents in plant stems, facilitating the extraction of commercial fibres like jute.

Your note

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