ULTRA VIOLET AND VISIBLE SPECTROSCOPY

Ultra violet and visible spectroscopy used to measure the extent of multiple bonds or aromatic conjugation within molecules. This test helps students to revise the concepts of electronic spectroscopy.

Challenge Yourself!!! ALL THE BEST!!!

1. Identify the auxochrome groups from the list given below

I -OH II -NH2 III C=O IV COO- V NO2 VI -SH

2. Read the statements given below and choose the correct ones:

I Chromophore: The group cannot absorb UV radiation.

II Auxochromophore: The group responsible for absorbing UV radiation

3. Identify the wrong statement from the options given below:

4. Bathochromic shift is seen in all cases except:

5. Given the fact that 1, 3-butadiene has a UV absorption of 217nm, the absorption wavelength (in nm)for the conjugated system shown below is

6. Identify the correct statements from the ones given below:

I Band appearing from n to pi* transition is called R band

II Band appearing from pi to pi* transition is called K band

7. The position and intensity of an absorption band may shift when the electronic spectrum is recorded in different solvents. Choose the wrong statement:

8. Use the Woodward rules to calculate the wavelength of an absorption band in the UV spectrum of the following compounds:

 

9. Woodward rules for conjugated dienes and carbonyl compounds shows deviation during

I Angular distortion

II Cross conjugation

III Steric crowded

10. Identify the correct options from the given statements


 

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