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NEET2009Chemistryp Block Elements (Group 13 & 14)Actual

The straight chain polymer is formed by

Options

  1. Ahydrolysis of ( CH ₃ )₃ SiCl followed by condensation polymerisation
  2. Bhydrolysis of CH ₃ SiCl ₃ followed by condensation polymerisation
  3. Chydrolysis of ( CH ₃ )₄ Si by addition polymerisation
  4. Dhydrolysis of ( CH ₃ )₂ SiCl ₂ followed by condensation polymerisation

Correct answer

D. hydrolysis of ( CH ₃ )₂ SiCl ₂ followed by condensation polymerisation

Step-by-step solution

RSiCl ₃ (trichloro derivatives) on hydrolysis followed by condensation polymerisation yields branched chain silicones. Straight chain silanes are silicone oils. These are more stable at high temperature than mineral oils and have less tendency to thicken at low temperature.

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