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  • 1(current)
Q. No.

The correct statement regarding polymeric silicon dioxide is -

 
1. Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms.
2. Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms.
3. Silicon atom is bonded to two oxygen atoms.
4. These are double bonds between silicon and oxygen atoms.
Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 79%
Level 2: 60%+
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When silicon is boiled with caustic soda solution, the gas is evolved is-

1. O2

2. SiH4

3. H2

4. None of the above

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 70%
Level 2: 60%+
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RCl →Sicu-powderR2SiCl2→H2O
R2SiOH2 →condensation A

Compound (A) is -

1. A linear silicone 2. A chlorosilane
3. A linear silane 4. A network silane
Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 70%
Level 2: 60%+
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A compound among the following that is not a monomer for a high molecular mass silicone polymer is-

1. Me3SiCl

2. PhSiCl3

3. MeSiCl3

4. Me2SiCl2

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 60%
Level 2: 60%+
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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 (- R2SiO - ) 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 |
 57%
Level 3: 35%-60%
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