Differentiate between the following compounds on the basis of UV spectra. Explain
your answer.

What is meant by a base peak and a molecular ion peak in mass spectrum? How is
mass spectrometry used in finding out mass of a compound? Explain.

Describe the concept of cleavages taking benzylic clevages in mass spectrometry. 

Predict the expected UV and IR spectra of the following compound

Describe different ionisation methods involved in mass spectrometry.

 List the benefits and limitations of COSY technqiue. 

Interpret the NMR spectra of the following compounds. Give the expected  values and
explain your answer.