Identify the correct sequence of increasing number of -bonds in t… - Vidyadip

MCQ

Identify the correct sequence of increasing number of $\pi$-bonds in the structure of the following molecules

$(I)\, H_2S_2O_6$ $(II)\, H_2S_2O_3$ $(III)\,H_2S_2O_5$

A
$I, II$ and $III$
B
$II, I$ and $III$
C
$II, III$ and $I$
D
$I, III$ and $II$

✓

Answer

$(c)$ $\underset{(I)}{\mathop{\begin{matrix}
O\,\,\,\,\,O \\
||\,\,\,\,\,\,\,|| \\
HO-S-S-OH \\
||\,\,\,\,\,\,\,\,|| \\
O\,\,\,\,\,\,O \\
\end{matrix}}}\,\,\,\,\,\underset{(II)}{\mathop{\begin{matrix}
S \\
|| \\
HO-S-OH \\
|| \\
O \\
\end{matrix}}}\,\,\,\,\,\underset{(III)}{\mathop{\begin{matrix}
O\,\,\,\,O \\
||\,\,\,\,\,\,\,|| \\
HO-S-\underset{\scriptscriptstyle\centerdot\centerdot}{S}-OH \\
||\,\,\,\,\,\,\,\, \\
O\,\,\,\,\,\,\,\, \\
\end{matrix}}}\,$

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