Explain Victor Meyer’s test for primary ...

Explain Victor Meyer’s test for primary `(1^@)` alcohol.

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In victor Meyer method when these alcohols are treated with `HI , AgNO_2, and NaOH` respectively they produce red, blue and colourless solution respectively.
Victor Meyer.s method :
(i) The given alcohol is converted into an iodide by concentrated HI or red phosphorous and iodine.
(ii) The iodide is treated with silver nitrite to form nitroalkane.
(iii) Nitroalkane is finally treated with nitrous acid `(NaNO_2 + H_2SO_4)` and made alkaline with KOH. If a blood red colour is obtained, the original alcohol is primary :

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Victor Meyer's test is not given by

`(CH_(3))_(3)COH`

`C_(2)H_(5)OH`

`(CH_(3))_(2)CHOH`

`CH_(3)CH_(2)CH_(2)OH`

Carboxylic acids are better reduced to primary alcohols by using :

`LiA l H_(4)`

`NaBH_(4)`

KOH/Ethylene glycol

Diborane

The correct order of boiling points for primary ( 1^@ ), secondary ( 2^@ ) and tertiary ( 3^@ ) alcohols is

`1^@gt2^@gt3^@`

`3^@gt2^@gt1^@`

`2^@gt1^@gt3^@`

`2^@gt3^@gt1^@`