4. Isomerism
GENERAL ORGANIC CHEMISTRY

232158 Which one of the following is optically active?

1 n-Butyl alcohol
2 Isobutyl alcohol
3 2-Butanol
4 Tertiary-Butyl alcohol
GENERAL ORGANIC CHEMISTRY

232159 Which one of the following compounds is capable of existing in a meso form?

1 3,3-dibromopentane
2 4-bromo-2-pentanol
3 3-bromo-2-pentanol
4 2,3-dibromopentane
5 2,4-dibromopentane
GENERAL ORGANIC CHEMISTRY

232162 The two isomers $X$ and $Y$ with the formula $\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{ClBr}_{2}$ were taken for experiment on depression in freezing point. It was found that one mole of $X$ gave depression corresponding to 2 moles of particles and one mole of $Y$ gave depression due to 3 moles of particles. The structural formulae of $\mathrm{X}$ an $\mathrm{Y}$ respectively are

1 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O}$
2 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{ClBr}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O}\right]$
3 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{BrCl} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}_{2}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
5 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}^{2} \mathrm{Br}_{2}\right.$
GENERAL ORGANIC CHEMISTRY

232163 The number of isomers for the compound with the molecular formula $\mathrm{C}_{2} \mathrm{BrCIFI}$ is

1 3
2 4
3 5
4 6
5 7
GENERAL ORGANIC CHEMISTRY

232158 Which one of the following is optically active?

1 n-Butyl alcohol
2 Isobutyl alcohol
3 2-Butanol
4 Tertiary-Butyl alcohol
GENERAL ORGANIC CHEMISTRY

232159 Which one of the following compounds is capable of existing in a meso form?

1 3,3-dibromopentane
2 4-bromo-2-pentanol
3 3-bromo-2-pentanol
4 2,3-dibromopentane
5 2,4-dibromopentane
GENERAL ORGANIC CHEMISTRY

232162 The two isomers $X$ and $Y$ with the formula $\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{ClBr}_{2}$ were taken for experiment on depression in freezing point. It was found that one mole of $X$ gave depression corresponding to 2 moles of particles and one mole of $Y$ gave depression due to 3 moles of particles. The structural formulae of $\mathrm{X}$ an $\mathrm{Y}$ respectively are

1 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O}$
2 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{ClBr}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O}\right]$
3 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{BrCl} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}_{2}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
5 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}^{2} \mathrm{Br}_{2}\right.$
GENERAL ORGANIC CHEMISTRY

232163 The number of isomers for the compound with the molecular formula $\mathrm{C}_{2} \mathrm{BrCIFI}$ is

1 3
2 4
3 5
4 6
5 7
GENERAL ORGANIC CHEMISTRY

232158 Which one of the following is optically active?

1 n-Butyl alcohol
2 Isobutyl alcohol
3 2-Butanol
4 Tertiary-Butyl alcohol
GENERAL ORGANIC CHEMISTRY

232159 Which one of the following compounds is capable of existing in a meso form?

1 3,3-dibromopentane
2 4-bromo-2-pentanol
3 3-bromo-2-pentanol
4 2,3-dibromopentane
5 2,4-dibromopentane
GENERAL ORGANIC CHEMISTRY

232162 The two isomers $X$ and $Y$ with the formula $\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{ClBr}_{2}$ were taken for experiment on depression in freezing point. It was found that one mole of $X$ gave depression corresponding to 2 moles of particles and one mole of $Y$ gave depression due to 3 moles of particles. The structural formulae of $\mathrm{X}$ an $\mathrm{Y}$ respectively are

1 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O}$
2 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{ClBr}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O}\right]$
3 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{BrCl} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}_{2}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
5 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}^{2} \mathrm{Br}_{2}\right.$
GENERAL ORGANIC CHEMISTRY

232163 The number of isomers for the compound with the molecular formula $\mathrm{C}_{2} \mathrm{BrCIFI}$ is

1 3
2 4
3 5
4 6
5 7
GENERAL ORGANIC CHEMISTRY

232158 Which one of the following is optically active?

1 n-Butyl alcohol
2 Isobutyl alcohol
3 2-Butanol
4 Tertiary-Butyl alcohol
GENERAL ORGANIC CHEMISTRY

232159 Which one of the following compounds is capable of existing in a meso form?

1 3,3-dibromopentane
2 4-bromo-2-pentanol
3 3-bromo-2-pentanol
4 2,3-dibromopentane
5 2,4-dibromopentane
GENERAL ORGANIC CHEMISTRY

232162 The two isomers $X$ and $Y$ with the formula $\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{ClBr}_{2}$ were taken for experiment on depression in freezing point. It was found that one mole of $X$ gave depression corresponding to 2 moles of particles and one mole of $Y$ gave depression due to 3 moles of particles. The structural formulae of $\mathrm{X}$ an $\mathrm{Y}$ respectively are

1 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O}$
2 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{ClBr}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O}\right]$
3 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Br}\right] \mathrm{BrCl} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}\right] \mathrm{Br}_{2} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{ClBr}_{2}\right] \mathrm{Br} \cdot \mathrm{H}_{2} \mathrm{O}$
5 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4} \mathrm{Br}_{2}\right] \mathrm{Cl} \cdot \mathrm{H}_{2} \mathrm{O} ;\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{Cl}^{2} \mathrm{Br}_{2}\right.$
GENERAL ORGANIC CHEMISTRY

232163 The number of isomers for the compound with the molecular formula $\mathrm{C}_{2} \mathrm{BrCIFI}$ is

1 3
2 4
3 5
4 6
5 7