31.

Two aromatic compounds having formula C₇H₈O which are easily identifiable by FeCl₃ solution test (violet colouration) are

• o-cresol and benzyl alcohol

• m-cresol and p-cresol

• o-cresol and p-cresol

• methyl phenyl ether and benzyl alcohol

The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is

• 3° < 2° < 1° 

• 3° > 2° > 1° 

• 3° < 2° > 1° 

• 3° > 2° < 1° 

The correct order of decreasing acidity of nitrophenols will be

• m-nitrophenol > p-nitrophenol > o-nitrophenol

• o-nitrophenol > m-nitrophenol > p-nitrophenol

• p-nitrophenol > m-nitrophenol > o-nitrophenol

• p-nitrophenol > o-nitrophenol > m-nitrophenol

An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0), glutamic acid (3.2) and arginine (10. 7) buffered at pH 6. What is the fate of the three acids?

• Glutamic acid migrates to anode at pH 6. Arginine is present as a cation and migrates to the cathode. Alanine in a dipolar ion remains uniformly distributed in solution

• Glutamic acid migrates to cathode and others remain uniformly distributed in solution.

• All three remain uniformly distributed in solution.

• All three move to cathode

Which one is not a constituent of nucleic acid?

• Uracil

• Guanidine

• Phosphoric acid

• Ribose sugar

In aqueous solution glucose remains as 

• only in open chain form

• only in pyranose form

• only in furanose form

• n all three forms in equilbrium

Reaction of formaldehyde and ammonia gives

• hexamethylene tetramine

• bakelite

• urea

• triethylene tetramine

Paracetamol is

• methyl salicylate

• phenyl salicylate

• N-acetyl p-amino phenol

• acetyl salicylic acid

Which one of the following is s-butyl phenyl vinyl methane?

Which of the following compounds is not formed in iodoform reaction of acetone?

• CH₃COCH₂I

• ICH₂COCH₂I

• CH₃COCHI₂

• CH₃COCI₃