Multiple Choice QuestionsWhat is the name of reaction when benzaldehyde changes in to benzyl alcohol?
Cannizzaro's reaction
Wurtz reaction
Kolbe reaction
Friedel-Craft's reaction
Aniline on treatment with HCl and NaNO2 gives
diazo salt
nitroaniline
chloroaniline
aminophenol
A sample of CHCl3 before using as an anaesthetic is tested by
AgNO3 solution after boiling with KOH
Ammonical cuprous chloride
Fehling solution
AgNO3
What is the correct order of acidity from weakest to strongest acid for these compounds :
I < IV < III < II
III < IV < III < II
IV < I < III < II
II < III < I < IV
Lucas test is given by an alcohol within 5 minutes. 0.22 g of which liberates 56 mL of CH4 at STP on treating with CH3MgI. The structure of alcohol is
CH3 - CHOH - CH3
(CH3)2CH - CHOH - CH3
CH3 - CH2 - CHOH - CH3
(CH3)3C - CHOH - CH3
The reaction in which phenol differs from alcohol is :
it undergoes esterification with carboxylic acid
it reacts with ammonia
it forms yellow crystals of iodoform
it liberates H2 with Na metal
The reaction involved in the oil of winter green test is :
Salicylic acid 
product
The product is treated with Na2CO3 solution. The missing reagent in the above reaction is :
phenol
NaOH
ethanol
methanol
(CH3)3COCH3 and CH3OC2H5 are treated with hydroiodic acid. The fragments obtained after reactions are respectively
(CH3)3CI + CH3OH; CH3I + C2H5OH
(CH3)3CI + CH3OH; CH3OH + C2H5I
(CH3)3COH + CH3I; CH3OH + C2H5I
CH3I + (CH3)3COH; CH3I + C2H5OH
A.
(CH3)3CI + CH3OH; CH3I + C2H5OH
The fragments obtained after reaction of (CH3)3COCH3 and CH3OC2H5 with hydroiodic acid are (CH3)3CI + CH3OH; CH3I + C2H5OH.
When mixed ethers are used, the formation of alkyl iodide depends on the nature of alkyl
groups. Methyl iodide is formed when one group is methyl and the other a primary or secondary alkyl group. This reaction follows SN2 mechanism and because of the steric effect of the larger group, I- attacks the smaller (Me) group.
CH3OC2H5 + HI CH3I + C2H5OH
When the substrate is a methyl t-alkyl ether, the products are t-RI and MeOH. This reaction follows SN1 mechanism and formation of products is controlled by the stability of
carbocation.
+ HI + CH3OH
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