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NEET CHEMISTRYP Block ElementsMedium

Question

The chain length of silicones can be controlled by adding:

A

CH3SiCl3CH_3SiCl_3

B

SiCl4SiCl_4

C

(CH3)2SiCl2(CH_3)_2SiCl_2

D

(CH3)3SiCl(CH_3)_3SiCl

Step-by-Step Solution

The chain length of the silicone polymer can be controlled by adding trimethylchlorosilane, (CH3)3SiCl(CH_3)_3SiCl. Upon hydrolysis, it forms trimethylsilanol, (CH3)3SiOH(CH_3)_3SiOH, which contains only one condensable hydroxyl group. It acts as a chain-terminating unit by capping the ends of the polymerizing chain, thus stopping further growth.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from P Block Elements. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYP Block Elementslengthsiliconescontrolledadding

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