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Questions  >>  JEEMAIN and NEET  >>  Chemistry  >>  Halogens
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Q)

For the reaction : $R - Br \rightarrow R - O - N=O$ the suitable reagent is

$\begin {array} {1 1} (A)\;NaNO_2 + HCl & \quad (B)\;HNO_2 \\ (C)\;AgNO_2 & \quad (D)\; KNO_2 \end {array}$

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A)
Alkyl nitrites are prepared by the action of alkyl halide and potassium nitrite only but in case of silver nitrite the main product is nitro alkane although a small amount of alkyl nitrite is also formed.
$R–Br\rightarrow R–O –N=O + KBr$
Ans : (D)
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