BCHET-147 · June 2022 · English
IGNOU BCHET-147 June 2022 Previous Year Question Paper
Organometallics, Bioinorganic Chemistry, Polynuclear Hydrocarbons And Uv-Vis, Ir Spectroscopy
Structured previous year question paper for BCHET-147, June 2022 session.
Max marks: 50 · Questions: 14
Verified: 29 Jul 2026
BACHELOR OF SCIENCE (GENERAL)
(BSCG)
Term-End Examination
June, 2022
BCHET-147 : ORGANOMETALLICS,
BIOINORGANIC CHEMISTRY, POLYNUCLEAR
HYDROCARBONS AND UV-VIS, IR
SPECTROSCOPY
Time : 2 Hours Maximum Marks : 50
Note :
(i) Attempt any five questions from Part A
and any five questions from Part B on
separate answer sheets.
(ii) All questions carry equal marks.
Part—A
Q1.(a) Explain the structure of chromate ion with the help of a suitable diagram. 3
(b) Give the balanced reaction of potassium permanganate with p otassium iodide in neutral medium.
Q2.Give the classification of organometallic compounds on the basis of the nature of their metal carbon (M –C) bond. Give one example each of any two categories.
Q3.What is the 18 electron rule in the context of me tal carbonyls ? With detailed calculation, show if it is obeyed in 2 10Mn CO and 2 9Fe CO .
Q4.With the help of a suitable diagram , give the explanation of the molecular energy level scheme for carbon monoxide. 5 [ 3 ]
Q5.Briefly explain any five major areas of study of bioinorganic chemistry.
Q6.Explain the general principle of the sodium - potassium pump.
Q7.Discuss the important features of the structure of heme in hemoglobin. 5 Part—B
Q8.(a) Draw the structures of any two active methylene compounds and give their names. 2
(b) How will you synthesi ze 2 -butenoic acid from ethyl 3 -oxobutanoate ? Write the sequence of the reactions and the reagents involved.
Q9.(a) Give the mechanism of Friedel -Craft’s acylation of naphthale ne. Also, write all the possible resonance structures of carbonation formed. 3
(b) Give the IUPAC name s of the following compounds :
Q10.(a) Give the IUPAC names of the following compounds : 3
(b) What are N -oxides of pyridine ? Why are they more reactive than pyridine ?
Q11.(a) Which electronic transitions in small organic molecules are responsible for the absorptions in the 200-800 nm region ? 3
(b) What are chromophor es ? Give an example.
Q12.Diagrammatically explain the orbital energy relationships between isolated and conjugated C = C and C = O groups.
Q13.Why do some molecules show IR spectrum ? Give the range of absorptions as well as the units in which IR absorptions are expressed . Diagrammatically explain how it may be plotted. 5 [ 6 ]
Q14.You are given the IR spectra of two compounds A and B, one of which is an alkane and another is an alcohol. Which bands you will look for in these two spectra ? Explain due to which vibrations these bands appear in the IR spectra. 5 2022 -147
(ii) (M-C) 2 10Mn CO 2 9Fe CO 200-800 nm BCHET–147 1,9
(80)