Indian Institute of Information Technology 2006 Entrance Exams IIT Entrance Exams JAM BIOTECHNOLOGY TEST - Question Paper

(D) neither a plane nor a centre of symmetry
47. Compare the pKa values of the subsequent acids:
(i) formic acid (ii) acetic acid (iii) monochloroacetic acid (iv) dichloroacetic acid
(A) (iv) < (iii) < (i) < (ii) (B) (i) > (ii) > (iii) > (iv) (C) (i) < (ii) < (iii) > (iv) (D) (iv) < (iii) < (i) < (ii)

48. Excess Br2 water reacts with salicylic acid: predict the product

Br

Br Br

(A)

Br



Br

(B)

OH
CO2H




Br





OH

Br Br
(C)



Br
(D)

CO2H

Br



Br Br
49. By heating a mixture of methylamine and chloroform with ethanolic KOH a typical product is produced. Hydrolysis of the product with HCl provide back methylamine. Identify the typical product?
(A) NH2OH (B) (CN)2 (C) N2H4 (D) CH3NC
50. What organic compound would be found when diazonium sulfate solution is boiled or
steam distilled? (A) aniline (B) biphenyl (C) phenol
(D) benzoic acid
51. To determine the strength of glycine in water a mixture of an aqueous solution of glycine and formalin is titrated against standard NaOH because
(A) basic character of the amine group of glycine is suppressed
(B) nitrogen is removed from glycine
(C) formalin stabilizes the zwitterionic form of glycine
(D) a new inner salt of glycine outcomes
52. Ethylenediaminetetraacetic acid (EDTA) forms a chelate compound with Mg(II) ion in water at pH 10. How many ring structures are produced surrounding the Mg(II) ion by the EDTA molecule?

(A) 4
(B) 5
(C) 6
(D) 2
53. K4[Fe(CN)6] produces intense blue coloured compound with Fe(III) ions in solution. The colour is due to

Earning:   Approval pending.