Spectroscopy


20 Questions MCQ Test GATE Chemistry Mock Test Series | Spectroscopy


Description
This mock test of Spectroscopy for Chemistry helps you for every Chemistry entrance exam. This contains 20 Multiple Choice Questions for Chemistry Spectroscopy (mcq) to study with solutions a complete question bank. The solved questions answers in this Spectroscopy quiz give you a good mix of easy questions and tough questions. Chemistry students definitely take this Spectroscopy exercise for a better result in the exam. You can find other Spectroscopy extra questions, long questions & short questions for Chemistry on EduRev as well by searching above.
QUESTION: 1

The rotational constant and the fundamental frequency of HBr are respectively, 20cm-1 and 4000cm-1. The corresponding values for DBR approximately are

Solution:



QUESTION: 2

Vibrations of diatomic molecules are usually modelled by a harmonic potential. If the potential is given by x2 the correct statement is

Solution:

given v = x2

∴ 

⇒ 

QUESTION: 3

The infrared spectrum of HCl gas shows an absorption band centred at 2700 cm–1. The zero point energy of HCl molecule under harmonic oscillator approximation is

Solution:



 

QUESTION: 4

The correct intensity pattern (M : M + 2 : M : 4) for the molecule CH2BrCl is

Solution:

QUESTION: 5

In ESR spectrum of CD3 radical molecule total number of line and intensity pattern is

Solution:

QUESTION: 6

An organic compound gives following spectral data

The compound is

Solution:

QUESTION: 7

The correct photoelectron spectrum of N2O molecule is

Solution:

*Answer can only contain numeric values
QUESTION: 8

For the below compound


The λmax value is ____mμ


Solution:

*Answer can only contain numeric values
QUESTION: 9

The total number of line in M-B spectrum of Fe(CO)5 is ________


Solution:

*Answer can only contain numeric values
QUESTION: 10

In the given compound of phosphorus




the total number of signal in 31P NMR in (a + b + c + d) is __________


Solution:

(a) total signal -1
(b) total signal -2
(c) total signal -2
(d) total signal -1

QUESTION: 11

The following data wire obtained from the vibrational fine structure in the vibronic spectrum of a  diatomic molecule|

Where ωe is the energy associated with the natural frequency of vibration and xe is the anharmonicity constant. The dissociation energy (De) of the molecule is

Solution:


QUESTION: 12

If the leading an harmonic correction to the energy of nth vibrational level of a diatomic molecule is  The total number of energy levels possible is approximately

Solution:

QUESTION: 13

The correct structure of DPPH (ESR reference) and hyperfine line with intensi by pattern in benzene solution is

Solution:

QUESTION: 14

The correct mass fragment of m/z 84 and 88 for below molecule is/are

Solution:


QUESTION: 15

The correct intensity pattern of the system

Solution:


QUESTION: 16

On the basis of Frank-condon principle the correct vibrational transition with intensity is/are


Solution:

on the basis of Frank condon principle all vibrational transition are correct

*Answer can only contain numeric values
QUESTION: 17

In 57Fe Mossbauer experiment source of 25.5 kev is moved to wards absorber at a velocity of 5.5 mms-1. The shift in frequency of the source for this sample is ____MHz


Solution:

*Answer can only contain numeric values
QUESTION: 18

In the complex ion  The structural information in ESR spectrum is given below
(a) The two Co (III) atoms may be connected by an  bridge
(b) The Co (III) and Co (IV) may be linked by a peroxy  bridge
(c) There may be two equivalent cobalt atoms the unpaired electron is undergoing equal interaction with both cobalt atoms.
Thus the actual structure of cobalt complex combination of a and c. So total number of line in ESR spectrum in the above information of (a + b + c) is ____________


Solution:

In information (a) single line in ESR, eight line in (b) information ,15 line in (c) information

*Answer can only contain numeric values
QUESTION: 19

The total number of line in the  ESR spectrum of above complex (theoretical + experimental) _____________


Solution:

*Answer can only contain numeric values
QUESTION: 20


For the above compound λmax____mμ


Solution:

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