CBSE
Multiple Choice QuestionsAmong the following which one does not act as an intermediate in Hofmann rearrangement?
RNCO
RCO
RCOHBr
RNC
When acetamide reacts with Br2 and caustic soda , then we get :
acetic acid
bromoacetic acid
methyl amine
ethyl amine
Correct order of basic nature is :
NH3 > CH3NH2 > C6H5NH2
C6H5NH2 > NH3 > CH3NH2
CH3NH2 > NH3 > C6H5NH2
none of the above
Aniline with CHCl3 and KOH on heating gives :
isocyanide
cyanide
phenol
salicylic acid
Nitrobenzene on treatment with zinc dust and aqueous ammonium chloride gives
C6H5N =N-C6H5
C6H5NH2
C6H5NO
C6H5NHOH.
Pyridine is less basic than triethylamine because
pyridine has aromatic character
nitrogen in pyridine is sp2 hybridised
pyridine is a cyclic system
in pyridine, lone pair of nitrogen is delocalised
Which of the following amines, can give N-nitrosoamine on treatment with HNO2?
Which of the following statement is true?
Trimethyl amines form a soluble compound with Hinsberg reagent and KOH.
Dimethylamines react with KOH and phenol to form an azo dye.
Methylamine reacts with nitrous acid and liberates N2 from aq. soln.
None of these
Assertion: Anilinium chloride is more acidic than ammonium chloride.
Reason : Anilinium chloride is resonance stabilised.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
The following sequence of reactions on A gives
