Me3SiCl is used during polymerization of organ silicones because

a.  Chain length of organic silicone polymers can be controlled by adding Me3SiCl

b.  Me3SiCl blocks the end terminal of silicone polymer

c.  Me3SiCl improves the quality and yield of the polymer

4.  Me3SiCl acts as a catalyst during polymerization

Choose the correct option

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 83%
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Match the species given in Column I with the hybridisation given in Column II.

A. Boron in [B(OH)4]- i. sp2
B. Aluminium in [Al(H2O)6]3+ ii. sp3
C. Carbon in Buckminsterfullerene iii. sp3d2
D. Germanium in [GeCl6]2-

Codes

Options:  A   B   C   D 
1.  ii  iii  i iii
2.  i   i  iii  ii
3. iii  ii ii i
4.  i  iii  ii  iii
Subtopic:   Structure & Properties of Allotropes of C | Properties of Structure of SiO2 & Other Compounds |
 87%
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Given below are two statements: 

Assertion (A): If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge.
Reason (R): Aluminium is trivalent while silicon is tetravalent.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 62%
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Silicon has a strong tendency to form polymers like silicones. The chain length of silicone polymer can be controlled by adding

1.  MeSiCl3

2.  Me2SiCl2

3.  Me3SiCl

4.  Me4Si

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 88%
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Quartz is extensively used as a piezoelectric material, it contains-

1.  Pb

2.  Si

3.  Ti

4.  Sn

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 85%
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Given below are two statements: 

Assertion (A):  Silicones are water-repelling in nature.
Reason (R): Silicones are organosilicon polymers, which have  ( - R 2 SiO - )  as repeating units.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 56%
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