ESR Spectroscopy MCQs for CSIR NET Chemistry - Inorganic Spectra assignment 4

This article contains a quiz with 15 MCQs from Chemistry chapter "Inorganic Spectroscopy". Topic of MCQ questions is ESR spectroscopy.

• Total Questions = 15
• Total Marks = 60
• Correct Answer = +4 Marks
• Incorrect Answer = -1 Marks

Inorganic Spectra Assignment 4 (ESR Spectroscopy)

Question 1.

Number of lines observed in the EPR spectra of AlH₃^• (²⁷Al, 100% I = 5/2)

(1) 64

(2) 16

(3) 6

(4) 24

1

2

3

4

Question 2.

How Bohr magneton β of a species varies with its mass?

(1) β ∝ m

(2) β ∝ 1/m

(3) β ∝ log (m)

(4) β ∝ m²

1

2

3

4

Question 3.

How many kramer’s doublets are present in the system with 2 unpaired electrons?

(1) 2

(2) 1

(3) 0

(4) 3

1

2

3

4

Question 4.

In the ESR spectra of Cu(II) complex, when g II >g ⊥ > g_e the unpaired electron reside in which orbital?

(1) d_xy

(2) d_xz

(3) d_x²-y²

(4) d_z²

1

2

3

4

Question 5.

What are the total no. of hyperfine lines expected for?

(1) 75

(2) 10

(3) 3

(4) 25

1

2

3

4

Question 6.

What are the total number of fine EPR lines expected from high spin Cr(II) complexes?

(Let for Cr, I = 3/2)

(1) 6

(2) 0

(3) 4

(4) 2

1

2

3

4

Question 7.

Which Electromagnetic radiations are used in Mossbauer Spectroscopy?

(1) γ rays

(2) UV rays

(3) Radio waves

(4) X rays

1

2

3

4

Question 8.

(R₃Ge)₂ on photolysis gives a radical, which shows the ESR spectrum. The ESR signals carrying the signature of ⁷³Ge (1 = 9/2) are in terms of:

(1) nine lines

(2) two lines

(3) ten lines

(4) one line

1

2

3

4

Question 9.

What are the total number of fine EPR lines expected from high spin Cr (II) complexes? (Let for Cr, I = 3/2)

(1) 6

(2) 0

(3) 4

(4) 2

1

2

3

4

Question 10.

Which of the following molecules are ESR active?

(1) Li₂

(2) Be₂

(3) N₂

(4) O₂

1

2

3

4

Question 11.

Which of the following molecules are ESR active?

(1) KMnO₄

(2) [Fe(CO)₆]²⁺

(3) K₄[Fe(CN)₆]

(4) K₃[Fe(CN)₆]

1

2

3

4

Question 12.

Which is the correct option regarding no. of hyperfine lines present in

(1) 7

(2) 25

(3) 13

(4) 10

1

2

3

4

Question 13.

What is the intensity ratio of signals of ^•CH₃ radical after splitting in ESR spectra?

(1) 1:3:3:1

(2) 1:2:2:1

(3) 1:1:1:1

(4) 1:2:3:1

1

2

3

4

Question 14.

Among the options given below, what according to you should be the no. of hyperfine lines present in the ESR spectra of [Cu(NH₃)₄]²⁺ (I_Cu = 3/2)?

(1) 6

(2) 36

(3) 16

(4) 26

1

2

3

4

Question 15.

Find out among all the given options what is correct option of no. of hyperfine lines for [Ti(H₂O)₆]²⁺ (I_Ti = 3/2)?

(1) 40

(2) 14

(3) 52

(4) 104

1

2

3

4

Return to-

• Chemistry Chapterwise & Topicwise MCQs

Answer Key

1. (4) 2. (2) 3. (2) 4. (3) 5. (1) 6. (3) 7. (1) 8. (3) 9. (3) 10. (4) 11. (4) 12. (2) 13. (1) 14. (2) 15. (4) 

For further questions queries or suggestions, please leave your comments below.