MCQ
The element which is the most abundant in the earth crust is
  • A
    $O$
  • B
    $S$
  • C
    $Al$
  • $H$

Answer

Correct option: D.
$H$
d
- Two lone pair one oxygen

- Molecule is ' $v$ ' shaped

- Bond angle is less than $104.5^{\circ}\left(102^{\circ}\right)$

- $O \cdot S \cdot$ of ' $O$ ' is $+2$

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$\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{F}_{3}}\,C\,OH+C{{H}_{3}}\,CH\,C{{H}_{3}}  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH  \\
\end{matrix}\xrightarrow{{{H}_{2}}S{{O}_{4}}}\begin{matrix}
   O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{F}_{3}}\,C\,OCH\,C{{H}_{3}}+{{H}_{2}}O  \\
   |\,\,\,\,\,\,\,\,\,\,\,\, \,\,\,\, \\
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}$

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