Propose the molecular formula for a compound that exhibits the following peaks in its mass spectrum (a) (M)+• at m/z = 46, relative height = 65.0 % of the base peak (b) (M+1)+• at m/z = 47, relative height = 1.4 % of the base peak   Question 10 options:   C4H6   C4H8O   C7H12   C4H4O   C2H6O

Propose a molecular formula for a compound that exhibits the given peaks in its mass spectrum. Draw a possible structure. M*• at m/z = 136, relative height = 12.1% (M+1)*• at m/z = 137, relative height = 1.2%

Which one is the incorrect statement regarding mass spectrum?   Question 25 options:   In case of alcohols,  M-18 peak is produced due to the loss of neutral H2O molecule  (Dehydration)   The relative heights of  (M)+• peak and (M+1)+• peak is used to calculate the number of carbon atoms   The structure likely contains a bromine atom if the (M+2)+• peak and (M)+• are almost similar in heights   The molecular ion peak (M)+• always represent the base peak    The structure likely contains a chlorine atom if the (M+2)+• peak is approximately one-third as tall as (M)+•

Determine the formula of the hydrocarbon compound where m/z=134. The mass spectrum indicates an M+2 peak in a 3:1 ratio. The IR spectrum also indicates a strong peak at 1760 cm1 Answer: