5 Membered Structure

Five-membered ring structures of fructose are given below . Mark the incorrect statement .

The unusually stable three membered unsaturated compound, Feist acid was found to be chiral in nature. Its structure is

A hydroxyl acid on heating gives a 5 - membered lactone. The acid is

In C_(60) 'x' number of 6 membered rings are present and 'y' number of 5 membered rings are possible then the difference of x " & " y is/are

Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?

Which of these is a member of the group of chemicals whose chemical structure is given below ?