44.

45.

46.

47.

48.

49.

50.

51.

52.

Which of the compound is most suitable with an infrared spectrum of the following data :
a broad absorption band at 3000 ला with some sharper bands appearing on its shoulder
at about 3060 നേ; a strong absorption at about 1700 ബേ; a sharp band at 1600 and
1475 cm; a series of sharp bands between 650 and 800 ला 1 ?

(^) Ethanol (B) Phenol

(೮) Benzoic acid (2) Acetic acid

Which of the given coordination complex cannot exhibit quadrupole splitting in 776
Mossbauer spectrum ?

டு ചത്ത) ൫ [Fe(CO).]
അ Na,[Fe(CN),] (iv) Na,[Fe(CN).NO]
(A) 0 (B) (ii) (C) (iii) ‏رم‎ ൩൬

The chemical shift between fat protons and water results in a frequency difference of
around 210 Hz at 1.5 T. What would be their frequency difference at 4.5 T ?
(A) 210 Hz (8) 420 Hz (C) 630 Hz ത 70Hz

'H NMR spectrum shows a singlet while 130 NMR exhibits two signals. Based on these
data, pick out a correct molecule from these options ?

(^) Chloroethane (B) 1,2-Dibromoethane

(C) Benzene (D) Acetone

Which of the following molecule would give the most prominent peak in the mass
spectrum corresponding to a radical cation formed by McLafferty rearrangement ?

டு CH,CH,COCH,CH,; (ii) CH,CH,CH,COCH,;
അ (CH;),CHCOCH,; (५) (CH,),CHCOCH(CH,),.
(A) 0 (B) (ii) (C) (iii) ‏رم‎ ൩൬

Find out a correct characteristic/s about n to 7* transition :
(i) | The molar absorptivity of the transition is generally less than 2000.
(ii) Hydrogen bonding solvent cause pronounced blue shifts.
(iii) The absorption band corresponding to the n to 7* transition is absent for hydrocarbon.
(ಹ) Only (i & ii) ൯) Only (i & iii)
(C) Only (i) (D) All of the above (i, ii & iii)
The absorption band maximum for iodine occurs at about 520 nm in the solvent CCl.
Assign a correct transition for this absorption.
(A) to o* (B) nto o* (ಲ) ஈரம்‌ (D) ಇಟ್‌
Predict the number of lines in the EPR spectrum of a solution of dimethyl nitroxide
radical (CH;),NO, assuming the lines do not overlap ? (I= 1 for 190; = for ரு)

(A) 21 (B) 12 (©) 24 (D) 3
Which one of the following species is EPR silent ?
0 [8] (0 [SP 0) (500 ೪) [8]
൧൭ ൪൭ ൮൯൯൩൭൫൭൧൦൧.
9 020/2021
[.7.0.]