Q61 · CSIR-NET Chemistry, December 2014
Paper: CSIR-NET December 2014 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Medium
The reaction between diphenyldichlorosilane and water in $1: 2$ molar ratio gives product A which on heating above $100^{\circ} \mathrm{C}$ yields a cyclic or polymeric product B . The products A and B respectively, are 
and 
and $\left(\mathrm{Ph}_{2} \mathrm{SiO}\right)_{\mathrm{n}}(\mathrm{n}=3,4 . 6$
and and $\left(\mathrm{Ph}_{2} \mathrm{SiO}\right)_{\mathrm{n}}(\mathrm{n}=3,4 . 6$(c)
and 
and (d)
Answer
Answer: C ✓ checked by 4AB · confidence medium
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
Ph₂SiCl₂ + 2H₂O → Ph₂Si(OH)₂ (A). On heating, the silanediol condenses to cyclic or linear siloxanes (Ph₂SiO)ₙ (B) (c).
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