Replacing the diazo group of benzenediazonium chloride (Sandmeyer, Gattermann, KI, HBF4, ethanol)

1. A.
   Structure (a)
2. B.
   Structure (b)
3. C.
   Structure (c)
4. D.
   Structure (d)

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1. A.
   $CuCN/KCN$
2. B.
   Cu (Powder)/ HBr
3. C.
   $H_{3}{PO}_{3}$
4. D.
   $\ {CH}_{3}{CH}_{2}OH$

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1. A.
   $C_{6}H_{6}$
2. B.
   $C_{6}H_{5}{NH}_{2}$
3. C.
   $C_{6}H_{5}COOH$
4. D.
   $C_{6}H_{5}Cl$

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1. A.
   $Ar - {NO}_{2}$
2. B.
   $Ar - F$
3. C.
   $\ Ar - Cl$
4. D.
   $Ar - H$

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1. A.
   CO, HCl and anhyd. $\mathrm{AlCl_3}$
2. B.
   Copper powder and HBr
3. C.
   Cu + Aq. $\mathrm{NaNO_2}$
4. D.
   KOH + $\mathrm{Br_2}$

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1. A.
   To obtain R-I from R-Cl
2. B.
   To obtain Ar-X by replacing diazo group of $\mathrm{AR\text{-}N_2^+\text{-}X^-}$ using CuCl / HCl
3. C.
   To obtain R-F from R-Cl using AgF
4. D.
   To obtain $\mathrm{R\text{-}CH_2\text{-}R}$ from R-CO-R using Zn-Hg / HCl

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1. A.
   Sandmeyer reaction
2. B.
   Mendius reaction
3. C.
   Hofmann rearrangement reaction
4. D.
   carbylamine reaction

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1. A.
   HI
2. B.
   KOI
3. C.
   KI
4. D.
   $\mathrm{PI_3}$

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1. A.
   $\mathrm{C_6H_5Cl + N_2}$
2. B.
   $\mathrm{C_6H_5Br + N_2}$
3. C.
   $\mathrm{C_6H_6 + N_2}$
4. D.
   $\mathrm{C_6H_5OH}$

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