16.

27

۔18

19.

20.

21.

22

The number associated with the flow of fluid through a pipe of radius 7 15:
(ಗಿ) Gold number (B) Mole number
(೮) Reynold number (D) None of the above

The Parke's process is carried out for the purpose ല്‌:
(A} Desilverization of lead (8) Determination of gold number
(C) Purification of gold (D) None of the above

The Mark - Howwink equation shows the relationship between :
(೩) Viscosity and mass of the polymer

(B) Viscosity and densily of the polymer

(0) The intrinsic viscosity and mass of the polymer

(D) None of the above

At N'T.P., the viscosity of hydrogen is 8.4 x 105 [೦೬೮ ೩೧೬ the average velocity വ the
7101000165 15 172103 ೦೫, 2೮೫ sec. Calculate the mean free 783 11 07971075,

(A) 1647 x10° cm (8) 1.8907x10% em
© 6.746x10% cm (7) 3.647 101 ‏عه‎

One mole of an ideal gas is heated from 100 K (0 300 K. Calculate AS if (a) the volume is kept
constant (b) the pressure is kept constant. Assume that C, =15 R.

(ക) 22.88] 171 (10171; 137011 717!
(8) 1370 | 1 ഇലി 1; 2,283 [ 1 1 ‏امم‎ 2
(© 1370] 1-1 ‏زا امھ‎ 22.83 1167-1 mol~1
യു 2283] 111” 1; 1.370 | ‏اح‎ प्राण्‌ 1

Classify the following substituents as ortho - para or meta direcling groups, if present on
benzene ring in aromatic electrophilic substitution reaction.

ദ ആ ய ௦ (1) ೫8: (iv) ‏وہ50‎
‎(வ) (i) ortho - para (1) 116 (111) meta (iv) ortho - para

(B) (i) meta (i) meta (111) ortho - para (iv) meta

(©) (i) meta (ii) ortho - para (iii) meta (iv) ortho - para

(D) (i) ortho - para (ii) ortho - para (111) ortho - para (iv) meta

What is the value 08 71 111 Huckel's rule of aromaticity when a compound has ¢ pairs of =
electrons ? Predict whether such a compound is aromatic, anti-aromatic or non-aromatic.

(A) n=5, non-aromatic (8) n=4, anti-aromatic
(C} n=4, aromatic (D) n=5, aromatic
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