Carbonyl (Aldehyde and Ketones) Carboxyl and Amino Groups in Organic Compounds NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Carbonyl (Aldehyde and Ketones) Carboxyl and Amino Groups in Organic Compounds MCQ Questions


7.
Which compound shows highest pKb (least basic) in aqueous solution?
A.
Dimethylamine
B.
Ammonia
C.
Aniline (resonance reduces basicity)
D.
Methylamine
😑 View Answer Rough Work Error
ANSWER :
C. Aniline (resonance reduces basicity)
8.
Schiff's reagent is decolourised pink solution of:
A.
Rosaniline hydrochloride decolourised by SO₂
B.
Phenolphthalein in alkali
C.
Methylene blue in acid
D.
Methyl orange in water
😑 View Answer Rough Work Error
ANSWER :
A. Rosaniline hydrochloride decolourised by SO₂
9.
A compound dissolves in dilute HCl but not in NaOH. It probably contains:
A.
Aldehyde group
B.
Phenolic group
C.
Amino group (-NH₂)
D.
Carboxyl group (-COOH)
😑 View Answer Rough Work Error
ANSWER :
C. Amino group (-NH₂)
10.
When acetone reacts with sodium hypoiodite (NaOI), the product formed is:
A.
Sodium iodide and water
B.
Iodoform (CHI₃) and sodium acetate
C.
Acetone iodide
D.
Acetic acid and HI
😑 View Answer Rough Work Error
ANSWER :
B. Iodoform (CHI₃) and sodium acetate
11.
Schotten-Baumann reaction is:
A.
Hydrolysis
B.
Reduction
C.
Diazotisation
D.
Acylation of amines/alcohols using acid chloride in NaOH
😑 View Answer Rough Work Error
ANSWER :
D. Acylation of amines/alcohols using acid chloride in NaOH
12.
Salicylic acid reacts with neutral FeCl₃ to give:
A.
Violet colour (due to phenolic -OH group)
B.
No colour
C.
Red colour only
D.
Buff colour
😑 View Answer Rough Work Error
ANSWER :
A. Violet colour (due to phenolic -OH group)