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 |
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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

          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 |
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Assertion: If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge.

Reason: Aluminium is trivalent while silicon is tetravalent.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.

2. Both assertion and reason are true and the reason is not the correct explanation of assertion.

3. Assertion is true but the reason is false.

4. Assertion is false but the reason is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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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 |
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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 |
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Cement, the important building material is a mixture of oxides of several elements. Besides calcium, iron, and sulphur oxides of elements of which of the group(s) are present in the mixture?

1. Group 2

2. Groups 2, 13, and 14

3. Groups 2, and 13

4. Groups 2, and 14

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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Assertion: Silicones are water-repelling in nature.

Reason: Silicones are organosilicon polymers, which have (-R2SiO-) as repeating units.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true, but the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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