Chemistry 2nd Paper CQ-Barishal Board-2017

1. (i) $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{OH}+[\mathrm{O}] \xrightarrow[+ \text { dil. } \mathrm{H}_{2} \mathrm{SO}_{4}]{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}} \mathrm{C}$

(ii) $\mathrm{B}+[\mathrm{O}] \xrightarrow[+ \text { dil. } \mathrm{H}_{2} \mathrm{SO}_{4}]{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}} \mathrm{D}$

[B compound is a position a isomer of compound $\mathrm{A}]$

2.

$\mathrm{E}_{\mathrm{M}^{2+} / \mathrm{M}}^{0}=-0.25 \mathrm{~V}, \mathrm{E}_{\mathrm{M}^{+} \mathrm{M}}^{0}=+0.799 \mathrm{~V}$ And, $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}^{0}}^{0}=-0.76 \mathrm{~V}$

3.

' $\mathrm{A}$ ' is an acidic hydrocarbon containing two carbons.

4.

5. (i) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Cl} \xrightarrow[350^{\circ} \mathrm{C}, 150 \mathrm{~atm}]{10 \% \mathrm{NaOH}} \mathrm{B} \xrightarrow[\text { distillation }]{\text { dilute } \mathrm{HCl}} \mathrm{C}$

(ii) Monochloro alkane containing 2-Carbon $\xrightarrow[\Delta]{\text { aqueous } \mathrm{NaOH}} \mathrm{D}$

B, C and D are organic compounds.