In which of the following reactions, the principal group loses its preferences?

Which of the following is regarded as the principal functional group ?

In IUPAC system of naming of organic compounds. Which of the following functional group has more preference than other ( in a poly functional compound)

Which of the following reactions will yeilds the product, than can be preferably used as solvent for the non-polar compounds ?

Which of the following reactions will yield the product, that can be preferably used as solvent for the non-polar compounds ?

Which of the following will lose charge at cathode ?

Which of the following metals loses its meniscus after reacting with ozone?

Which of the following reaction is preferred at anodes during the electrolysis of H_(2)SO_(4) at higher concentration ?