Silicones
Trending Questions
- Me2SiCl2
- Me3SiCl
- Me4Si
- MeSiCl3
Correct statements among (I) to (IV) regarding silicons are :
I. They are polymers with hydrophobic character.
II. They are biocompatible.
III. In general, they have high thermal stability and how dielectric strength.
IV. Usually, they are resistant to oxidation and used as greases.
- I and II only
- I, II, III only
- I, II, III and IV
- I, II and IV only
- CH3SiCl3 and Si(CH3)4
- (CH3)2SiCl2 and CH3SiCl3
- SiCl4 and (CH3)3SiCl
- (CH3)2SiCl2 and (CH3)3SiCl
- Cyclic silicates
- Pyro silicates
- Chain silicates
- both a and c
- water proofing treatments
- surgical and cosmetic plants.
- cutting and grinding tools
- insulating materials for electric motors
An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What is 'B' in the chemical reactions.
SnCl2
Sn(OH)Cl
SnCl4
Na2SnO2
- Ortho silicates
- Pyro silicates
- Cyclic silicates
- 2D-sheet silicates
- They are made up of Si4−4 units
- They are polymers made up of R2SiO units
- They are water soluble compounds.
- They are hydrophilic in nature
- CH3SiCl3 and Si(CH3)4
- (CH3)2SiCl2 and (CH3)3SiCl
- (CH3)2SiCl2 and CH3SiCl3
- SiCl4 and (CH3)3SiCl
- Monomers
- Dimers
- Polymers
- Trimers
- Silica gel
- Zeolite
- Silicone
- Asbestos
I. They are polymers with hydrophobic character.
II. They are biocompatible.
III. In general, they have high thermal stability and high dielectric strength.
IV. Usually, they are resistant to oxidation and used as greases.
- I and II only
- I, II, III only
- I, II, III and IV
- I, II and IV only
- R3SiCl
- R4Si
- RSiCl3
- R2SiCl2
I. They are polymers with hydrophobic character.
II. They are biocompatible.
III. In general, they have high thermal stability and high dielectric strength.
IV. Usually, they are resistant to oxidation and used as greases.
- I and II only
- I, II, III only
- I, II, III and IV
- I, II and IV only
A+2H2O −−−−−→−2HCl HO−R|Si|R−OH
HO−R|Si|R−OH+HO−R|Si|R−OH→ B
Identify A and B
Cl−R|Si|R−Cl
HO−R|Si|R−O−R|Si|R−OH
O−R|Si|R−O
None of these
An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What are (A) to (C) and give the chemical reactions.
A=(SnO2 B=Sn(OH)2 C=SnCl2
A=Sn(NO3)2 B=SnCl2 C=Sn(OH)2
A=SnCl2 B=Sn(OH)Cl C=Sn(OH)2
A=SnCl2 B=SnH4 C=Sn(OH)2
(a) They are polymers with hydrophobic character
(b) They are biocompatible
(c) In general, they have high thermal stability and low dielectric strength
(d) Usually, they are resistant to oxidation and are used as greases
- (a), (b) and (c) only
- (a), and (b) only
- (a), (b), (c) and (d)
- (a), (b) and (d) only
CO2
SiO2
SnO2
CaO
- The chain length of organosilicon polymers can be controlled by adding (CH3)3SiCl
- (CH3)3SiCl improves the quality and yield of the polymer
- (CH3)3SiCl does not block the end terminal of silicone polymer
- (CH3)3SiCl acts as a catalyst during polymerisation
- Al2O3
- SiC
- CaCN2
- CaC2
An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What is 'B' in the chemical reactions.
SnCl2
Sn(OH)Cl
SnCl4
Na2SnO2
- (Me)2Si(OH)2
- (Me)2Si=O
- −[−O−(Me)2Si−O−]−n
- Me2SiCl(OH)