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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
s Block Elements

NTA Abhyas 2020 · Chemistry · s Block Elements

Among the following, the group of molecules that undergoes rapid...

Among the following, the group of molecules that undergoes rapid hydrolysis is

Options

  1. ASF6,Al2Cl6,SiMe4S{F}_{6}, A{l}_{2}C{l}_{6}, SiM{e}_{4}
  2. BBCl3,SF6,SiCl4BC{l}_{3}, S{F}_{6}, SiC{l}_{4}
  3. CBCl3,SiCl4,PCl5BC{l}_{3}, SiC{l}_{4}, PC{l}_{5}
  4. DSF6,Al2Cl6,SiCl4S{F}_{6}, A{l}_{2}C{l}_{6}, SiC{l}_{4}

Correct answer

C. BCl3,SiCl4,PCl5BC{l}_{3}, SiC{l}_{4}, PC{l}_{5}

Step-by-step solution

BCl3,SiCl4BC{l}_{3}, SiC{l}_{4} and PCl5PC{l}_{5} get radily hydrolysed to give orthoboric, orthosilicic and phosphoric acid respectively.

BCl3+3H2O→H3BO3+3HClBC{l}_{3} + 3{H}_{2}O \to {H}_{3}B{O}_{3} + 3HCl

SiCl4+4H2O→H4SiO4+4HClSiC{l}_{4} + 4{H}_{2}O \to {H}_{4}Si{O}_{4} + 4HCl

PCl5+H2O→POCl3+2HCl→H2O(excess)H3PO4+HClPC{l}_{5} + {H}_{2}O \to POC{l}_{3} + 2HCl\overset{{H}_{2}O\left(excess\right)}{→}{H}_{3}P{O}_{4} + HCl
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