Silicones
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NEET 2013
- Me3SiCl
- PbSiCl3
- MeSiCl3
- Me2SiCl2
Glass is soluble in
aqua-regia
HF
H2SO4
HClO4
A+2H2O −−−−−→−2HCl HO−R|Si|R−OH
HO−R|Si|R−OH+HO−R|Si|R−OH→ B
Identify A and B
The general formula of silicones is
CO2
SiO2
SnO2
CaO
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.
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
Among the following substituted silanes, the one which will give rise to cross-linked silicone polymer on hydrolysis is:
Me2SiCl2 on hydrolysis will produce
Me2Si(OH)2
Me2SiO
[−O−Me2Si−O−]n
Me2SiClOH
- R3SiCl
- R4Si
- RSiCl3
- R2SiCl2