p-Block elementsHard
Question
Consider the following statements and which of the following are correct
S1 : B4O72- on hydrolysis with acid / water yields B(OH)3.
S2 : SiO44- on hydrolysis with acid / water yields Si2O76-.
S3 : MeSiCl3 on hydrolysis and then condensations gives a complex cross-linked polymer of silicones.
S4 : Among CO2, CuO, CaO and H2O, CO2 is most acidic oxide while CaO is most basic oxide.
S1 : B4O72- on hydrolysis with acid / water yields B(OH)3.
S2 : SiO44- on hydrolysis with acid / water yields Si2O76-.
S3 : MeSiCl3 on hydrolysis and then condensations gives a complex cross-linked polymer of silicones.
S4 : Among CO2, CuO, CaO and H2O, CO2 is most acidic oxide while CaO is most basic oxide.
Options
A.S1 S2 S3 only
B.S1 S3 S4 only
C.S1 S2 S3 S4
D.S2 S3 S4 only
Solution
S1 : B4O72- 
B(OH)3 ; S2 : SiO44- 
Si2O76-
S3 :
+ 3H2O 
Complex cross-linked polymer of silicones
B(OH)3 ; S2 : SiO44- Si2O76-S3 :
+ 3H2O Complex cross-linked polymer of silicones
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