Which one of the following compounds would undergo nitration with greatest ease?

1.  Benzene

2.  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

C₆H₅OH + CHCl₃ + NaOH → salicylaldehyde 

The electrophile involved in the above reaction is. 

Which does not have a carboxyl group ?

1.  Picric acid 

2.  Ethanoic acid 

 3.  Aspirin

4.  Benzoic acid 

Picric acid is a yellow coloured compound. Its chemical name is

1.  m-nitrobenzoic acid 

2.  2, 4, 6-trinitrophenol 

 3.  Trinitrotoluene 

4.  trinitroaniline 

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 

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 

Phenol on treating with concentrated H₂SO₄ at 100ºC mainly produces

(1)  ortho – phenolsulphonic acid 

 (2)  para – phenolsulphonic acid 

(3) A 50% mixture of ortho – and para – phenolsulphonic acid 

(4)  Phenol – 2, 4, 6 – trisulphonci acid 

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 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