Which of the following group is the reactive group in cotton? | Agrigyan

Polyester is a highly crystalline, hydrophobic synthetic fiber with a compact macromolecular structure that has no ionic dye sites. When dyed with disperse dyes at atmospheric boil (around $100^{\circ}\text{C}$), chemical carriers (such as orthophenylphenol, biphenyl, or chlorinated benzenes) are required to swell the polyester fiber, reduce the glass transition temperature ($T_g$), and accelerate dye diffusion into the amorphous zones.

Option analysis:

• Silk: Incorrect. Natural protein fiber easily dyed with acid and reactive dyes without carriers.
• Wool: Incorrect. Dyed with acid, metal-complex, or reactive dyes under mild conditions.
• Nylon: Incorrect. Polyamide fiber readily receptive to acid and disperse dyes without swelling carriers.
• Polyester: Correct. Carriers are essential for atmospheric exhaust dyeing of polyester fibers with disperse dyes.

Kasuti is a traditional folk embroidery of Karnataka, worked on Ilkal saris using four distinct stitches: Gavanti, Murgi, Negi, and Menthi. Its motifs are geometricized folk and religious symbols drawn from everyday temple and home life, such as the Tulsi pot holder (Tulsi Vrindavan/Kuta), temple chariots (ratha), gopurams, palanquins, peacocks, and conch shells.

Option analysis:

• Tulsi pot holders: Correct. The Tulsi Vrindavan / pot holder is a hallmark traditional motif of Karnataka's Kasuti embroidery.
• Creepers: Incorrect. Common curvilinear motifs in Kantha or Chikan, not typical geometric Kasuti.
• Intricate jali patterns: Incorrect. Characteristic of Chikankari of Lucknow.
• Weeping willow and pine: Incorrect. Traditional motifs seen in Kashmiri Kashida embroidery.

Jamdani is a celebrated figured muslin weave historically developed in Bengal. A quintessential ornamental feature of Jamdani saris is the 'konia' (or konia-kalka) motif, a decorative corner paisley or mango design that anchors the corners of the pallu/anchal, surrounded by intricate floral jhalar and butidar patterns.

Option analysis:

• Kashida: Incorrect. Kashmiri needle embroidery featuring chinar, almond, and bird motifs.
• Brocades: Incorrect. Heavy metallic zari jacquard weaves of Banaras.
• Jamdani: Correct. Celebrated Bengali muslin weave famously decorated with the traditional konia corner motif.
• Patola: Incorrect. Double-ikat silk weaves of Patan, Gujarat, featuring geometric elephants, parrots, and dancing figures.