Chapter Name: Spectroscopic Techniques and its Applications
Questions Carrying 02 marks
Sr. Questions CO Bloom
No. Mapped taxonomy
Level
1 What is the importance of Finger Print Region in IR CO-3 L-4
spectroscopy
2 What is the essential conditions for a molecule to be IR active L-4
CO-3
3 Calculate the number of signals for the following compounds : L-3
(a) CH3-CH2-O-CH3 (b) CH3-CH2-CH2-OH CO-3
4 Explain the rules governing allowed transitions in spectroscopy, CO-3 L-2
particularly for vibrational and rotational spectra.
5 Why is TMS used as an internal standard in NMR spectroscopy CO-3 L-5
6 What is spin-spin coupling in NMR CO-3 L-1
7 How is IR spectroscopy useful to distinguish between inter and CO-3 L-4
intra molecular hydrogen bonding
8 n-π* transition in UV spectroscopy is forbidden whereas π-π* CO-3 L-2
transition is allowed Explain
9 Explain the selection rule of Uv-visible spectroscopy CO-3 L-2
10 What is chromophore? What structural features may produce CO-3 L-1
chromopheric effect in an organic molecule
11 How many transitional, rotational and vibrational degree of CO-3 L-3
freedom are there in H2O and CH4 molecule
12 Which of the following are NMR active and why : C12, O16, F19, CO-3 L-4
N14 and H2
13 Explain functional group region in IR spectroscopy with suitable CO-3 L-2
example
14 What are overtone, Hot Bands and Fermi Resonance in IR CO-3 L-1
spectra
15 Define Batho chromic and Hyper chromic shift with suitable CO-3 L-1
examples
16 Calculate the fundamental mode of vibrations in following CO-3 L-5
molecules BF3 and NH3
17 Define Bee- Lamberts’ law and give its limitations CO-3 L-1
18 Discuss about stretching and bending Vibrations with suitable CO-3 L-5
examples
19 What is the effect of solvent on the absorption of UV visible CO-3 L-3
spectroscopy?
20 Among 1,3-hexadiene and 1,4-hexadiene, which molecule will CO-3 L-4
absorb at a long wavelength and why ?
Chapter Name: Spectroscopic Techniques and its Applications
Questions Carrying 04 marks
Sr. Questions CO Bloom
No. Mapped taxonomy
Level
1. Discuss the principle of Electronic spectroscopy. Explain with CO-3 L-5
reference to CH2=CH2 , 1, 3 butadiene and carbonyl compounds
2 Give Important Application of Uv-visible Spectroscopy with CO-3 L-3
proper examples
3 Explain chemical shift in NMR. also give various factors CO-3 L-2
affecting Chemical shift
4 How many NMR signals can be observed in the spectrum of : a) CO-3 L-4
CH3COOCH3, b) CH3-CH2=CH2-CH3 c) CH3-CH2-CH3
5 How can you identify the Alkane, Alkene and Alkynes on the CO-3 L-3
basis of IR spectroscopy? Explain
6 What type of nuclei show NMR spectra? Give High Resolution CO-3 L-1
HNMR spectrum of ethanol
7 Explain various electronic transition possible in UV CO-3 L-2
Spectroscopy through example
8 Calculate the fundamental mode of vibration in following CO-3 L-5, L-1
molecules : BF3, NH3, Define (a) bathochromic shift (b)
Hyperchromic shift
9 What are the selection rules in vibrational and rotational CO-3 L-3
transition in diatomic molecules
10 Define Auxochrome and chromophore with suitable examples CO-3 L-1
11 What are the different factors which affect the value of λ max CO-3 L-4
and intensity of spectral line
12 What is fluorescence? Explain its medical application. Also give CO-3 L-1
the normal mode of vibration for a molecule of CO2
13 Explain the theory of NMR spectroscopy? Define spin-spin CO-3 L-2
relaxation and spin spin coupling
14 Draw a well labeled Jablonskii diagram and Explain (i) CO-3 L-6, L-2
Intersystem crossing (ii) Fluorescence (iii) Phospherence
15 Interpret number of signals in following molecules CO-3 L-4
CH3-CO-CH3, 2-chloropropane Compile shielding and
desheilding of proton in NMR spectra
16 What is Vibration frequency? Explain the various factors CO-3 L-1 , L-2
affecting vibrational frequency?
17 Write short note on ; Up field shift and downfield shift CO-3 L-1
18 Write short note on a) Coupling constant b) spin -spin coupling CO-3 L-1
19 How will you distinguish between the following by 1H NMR CO-3 L-3
spectroscopy (a) o-dibromobenzene and m-dibromobenzene (b)
1-chloropropane and 2-chloropropane
20 Draw and explain the splitting pattern observed in 1HNMr of CO-3
CHCl2-CH2Cl L-6
