MCQ
$IUPAC$ name of the compound $\mathop C\limits^4 {H_2} = \mathop C\limits^3 H - \mathop C\limits^2 {H_2} - \mathop C\limits^1 {H_2}OH$ is
- A$1-$ buten $-4-$ ol
- ✓$3-$ buten $-1- $ ol
- C$4-$ hydroxy $-1-$ butene
- D$1-$ butenol $- 4$
$3$- buten - $1$ -ol
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$PH _{3}, B _{2} H _{6}, CCl _{4}, NH _{3}, LiH$ and $BCl _{3}$ is ..... .
$(a)$ The vapour pressure of water at $280 K$ is $14.2$ $mm Hg$
$(b)$ $R =0.082 L$ atm $K ^{-1} mol ^{-1}$

How many ${H^ \ominus }$ shifts are involved in above rearrangement :
${H_3}C - C \equiv CH\,\xrightarrow[{HgS{O_4}}]{{{H_2}O,\,{H_2}S{O_4}}}\,\mathop {Intermediate}\limits_{(A)} \,$$ \to \,\mathop {\Pr oduct}\limits_{(B)} $