A positive carbylamine test is given by
I. N, N-dimethylaniline
II. 2, 4-dimethylamine
III. N-methyl-o-methylaniline
IV. p-methylbenzyl amine
(II) and (IV)
(I) and (IV)
(II) and (III)
(I) and (II)
Identify the final product B of the reaction
C6H5COOH + NaHO3 → gas (A) (B)
Here, = C14
H3COOH
C6H5OOH
CH3OOH
HOOCH3
CH3CHO + HCHO
The structure of the compound B is
CH2=CH-CH(OH)-COOH
CH2=CH-CH(CN)-OH
CH3-CH2-CN(CN)OH
CH3--COOH
Which of the following compounds is most acidic?
Cl-CH2-CH2-OH
A.
The correct order of acidic strength is
Phenols are stronger acids than alcohols because the phenoxide ion left after the release of a proton is stabilised by resonance but the alkoxide ion is not. Further, the electron-withdrawing groups (-NO2) whch stabilise the phenoxide, on by dispersing the negative charge relative to phenol increase the acidic strength of phenols, whereas electron donating group (-CH3) which destabilise the phenoxide ion by intensifying the negative charge relative to phenol tend to decrease the acidity of phenols.
Phenol + CCl4 + KOH → X;
Which of the following statement is true for X?
It gives effervescence with NaHCO3
Gives silver mirror with Tollen's reagent
Does not give the red colour with FeCl3
All of the above