MCQ
Number of metamers represented by molecular formula ${C_4}{H_{10}}O$ is
- A$4$
- ✓$3$
- C$2$
- D$1$
$C{H_3}C{H_2}OC{H_2}C{H_3}$$(I),$ $C{H_3}OC{H_2}C{H_2}C{H_3}$$(II)$
and $C{H_3}OCH{(C{H_3})_2}$$(III).$
Here $I$ and $II, I$ and $III$ are pairs of metamers.
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$\mathrm{C}\mathrm{H}_{3} -\mathrm{C} \equiv \mathrm{CH} \xrightarrow[873\;K]{\text { red hot iron tube}} \mathrm{A}$
the number of sigma$(\sigma)$ bonds present in the product $A$ is