$CH_3-CH=O$ $(I)$ $\rightleftharpoons$ $CH_2=CH-OH$ $(II)$
Between the two tautomers,which is more stable?

  • A
    $I$
  • B
    $II$
  • C
    $I = II$
  • D
    None of these

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$X$ and $Y$ are optically active isomers having the molecular formula $C_5H_9Cl$. When treated with one mole of $H_2$,$X$ gets converted to an optically inactive compound $Z$,but $Y$ gives an optically active compound $P$. The structures of $X$ and $Y$ respectively are:

Identify which of the structures below are meso structures?

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The correct relationship between molecules $I$ and $II$ is:

$A$ similarity between optical and geometrical isomerism is that

Which of the following compounds has a plane of symmetry?
$R = -CH(Cl)-CH_3$
$S = -CH(Cl)-Br$

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