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Question 2 2 During mass spectrometry experiments, no two moleculeswill be fragmented and ionize manner. The statement is A True B) False
Question 3 quring FAB in MS, the sample that has to be ionized is bombarded with? A Protons B) Electrons Neutrons
Question 5 1 Point In mass spectrum, the peak having the highest m/z value is called as Base peak Fragment peak Isotopic peak Molecular lon
Question 6 1 Point Electrospray also known as ionspray/ESI is A soft ionization technique B suitable for non-volatile compound Proteins and nucleic acids analyses All
Question 7 1 Point The 13C NMR signals are weaker than TNMR signals because of A High abundance of 13C B Low abundance of 13C Resonance frequency for 13C is much lower than in 1H b and
Question 8 1 Point The exact chemical shift value for carbon atons can be used to identify the type of functional group present in the molecule A True (BFalse
Question 9 1 Point Factors affecting the chemical shift are the same as in proton NMR and caused same deshielding effects as in proton NMR A Electronegativity B Hybridization Anisotropy All are correct
Which of the following is not true for 13C NMR? A In 1H decoupled spectra, all the 13C will give single peaks B The chemical shift value for 13C spectrum can be used to identify the type of functional group present in the molecule In heteronuclear coupled spectra, all the 13C will give single peaks All Question 11 2 Points Why is the chemical shift value for 13C greater than for 'H in NMR? Reason/s. Use the editor to format your answer
Use the editor to format your answer Question 12 2 Points Why homonuclear (C-C) coupling is not observed in 1C spectra? Reason/s. Use the editor to format your answer
Question 13 2 Points Write the ionization techniques for volatile and non-volatile samples separately? Use the editor to format your answer
Question 17 2 Points What is NOE effect? Write one chemical structure with NOE effect? Use the editor to format your answer