Me3SiCl is used during polvmerisation of grgane silicones because (A) The chain length of orange silicone polymers can be controlled by adding Me3 (B) Me3SiCl blocks, the end terminal of silicone polymer. (C) Me3SiCl improves the quality and yield of the polymer. (D) Me3SiCl acts as a catalyst during polymerization.

Me₃SiCl is used during polvmerisation of grgane silicones because

(A) The chain length of orange silicone polymers can be controlled by adding Me3

(B) Me₃SiCl blocks, the end terminal of silicone polymer.

(C) Me₃SiCl improves the quality and yield of the polymer.

(D) Me₃SiCl acts as a catalyst during polymerization.

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Alok Kumar Singh | Contributor-Level 10

8 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

(A) & (B)

Me₃SiCl is a soleuless liquid and is stable in anhydrous condition. When added in the process of polymerization, it blocks the end terminal of the silicone polymer and determines its chain length.

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(i)→ (b), (ii) → (c), (iii) → (b), (iv) → (a) (v)→ (b) (vi)→ (c)

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(i)→ (c) (ii)→ (d) (iii)→ (a) (iv)→ (e) (v)→ (b)

Match the species given in Column I with the properties mentioned in Column II.

Column I

Column II

(i) BF₄⁻

(a) Oxidation state of central atom is +4

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(i)- (e), (ii)- (c), (iii)- (d), (iv)- (a) & (b)

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Chemistry NCERT Exemplar Solutions Class 11th Chapter Eleven 2025

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(i) Boron in [B(OH)₄]⁻	(a) sp²
(ii) Aluminium in [Al(H₂O)₆]³⁺	(b) sp³
(iii) Boron in B₂H₆	(c) sp³d²
(iv) Carbon in Buckminsterfullerene
(v) Silicon in SiO₄⁴⁻
(vi) Germanium in [GeCl₆]²⁻

Column I	Column II
(i) Diborane	(a) Used as a flux for soldering metals
(ii) Gallium	(b) Crystalline form of silica
(iii) Borax	(c) Banana bonds
(iv) Aluminosilicate	(d) Low melting, high boiling, useful for measuring high temperatures
(v) Quartz	(e) Used as catalyst in petrochemical industries.

Column I	Column II
(i) BF₄⁻	(a) Oxidation state of central atom is +4
(ii) AlCl₃	(b) Strong oxidising agent
(iii) SnO	(c) Lewis acid
(iv) PbO₂	(d) Can be further oxidised
	(e) Tetrahedral shape