40,

41,

42,

43,

44.

45,

46.

47,

48,

49,

When aqueous solvents are to be used in IR spectroscopy, sample and reference cells are
made of :

(A) CaCl, (B) CaF, © ‏ع‎ ணன

Natural rubber can be distinguished from butyl rubber by an IR spectral peak around :
(^) 1200 1 ) 1600 ‏مه 2600 )€( 1 مه‎ 1 (D) None of these

Enantioselective epoxidation of allylic alcohols can be achieved by :
(^) Al-isopropoxide (8) Sn-isopropoxide
(C) Ti-isopropoxide diethyl tartarate (D) None of these

The shape of CIF} is :
(ಹ) Angular (8) Linear (ಲ) Triagonal (D) None of these

The residual entropy associated with a crystal with 6 possible orientations will be nearly :
(ಹಿ) 10 ® 15 © 15 (D) 35

The point group of 1, 1-difluoroethylene is :
(है) ‏من‎ ൫ ‏.هم‎ ര ‏وو‎ യു യ്മ

एण the reaction A~ B — C, where k; =5x10%5~" and k,=3x10° 57, time at which [B] is
maximum 15 ;

(ಹ) 2.൮7 ൫ 1150-7௦ (C) 25510768 (7) 2.55 8

The number of radial nodes for 4s orbital of hydrogen atom is :
കു? ൫ 4 © 3 യു 2

The number of metal-metal bonds in Iry(CO),, and Fey(CO),, are respectively :
@A) 63 ® 36 © 64 o 46

The magnetic moment of a six co-ordinate transition metal complex is approximately 6 BM.
Identify the complex if it is both ESR and Mossbauer active.

ക M) (B) மணை © ரணை (D) ಗಾರು

7 033/2018
{P.T.O}