Related InterviewSolutions

• Picric acid is a yellow coloured compound. Its chemical name is1.  m-nitrobenzoic acid 2.  2, 4, 6-trinitrophenol  3.  Trinitrotoluene 4.  trinitroaniline 
• In the Libermann's nitroso reaction, sequential changes in the colour of phenol occurs as  (1) Deep blue → red → deep blue (2) Red → Deep Blue → Green (3) Red → Green →White (4) White →Red →Green 
• Phenol on treating with concentrated H2SO4 at 15–20ºC mainly produces (1)  Phenol -2 – sulphonic acid (2)  Phenol -4 – sulphonic acid (3)  A 50% mixture of ortho and para phenol sulphonic acid  (4)  Phenol – 2, 46 – trisulphonic acid 
• The lowest pKa is that of (1) Ethanol (2) propanol (3) propane (4) phenol
• Assertion (A): Phenols are more acidic than aliphatic alcohols.Reason (R): Phenoxides are stabilized by resonance. (1)  Both A & R are correct, R is the correct explanation of A.(2)  Both A & R are correct, R is not the correct explanation of A (3)  A is correct but R is incorrect  (4)  A is incorrect but R is correct 
• Which of the following order is true regarding the acidic nature of phenol? (1)  Phenol > o – Cresol > o – Nitrophenol (2)  Phenol > o – Cresol < o – Nitrophenol (3)  Phenol < o – Cresol < o – Nitrophenol  4)  Phenol < o – Cresol > o – Nitrophenol 
• In the following compoundsI. PhenolII. 4-methyl phenolIII. 3-nitrophenol IV. 4-nitrophenol  The order of acidity is  1. III > IV > I > II 2. I > IV > III > II 3. II > I > III > IV 4. IV > III > I > II 
• Which one of the following compounds would undergo nitration with greatest ease?1.  Benzene2.  Phenol 3.  Nitrobenzene 4.  Benzoic acid 
• On distilling 2 – hydroxy benzoic acid with Zn dust, it gives  (1)  Phenol (2)  Benzoic acid (3)  Benzaldehyde (4)  A polymeric compound
• Phenol is 1.  a base weaker than ammonia 2.  an acid stronger than carbonic acid  3.  an acid weaker than carbonic acid 4.  a neutral compound