In aqueous solutions there are three forms of glucose: the D-form (36%), the E-form (64%) and a trace amount of the open-chain form. At equilibrium, the alpha and beta cyclic forms are

interconverted by way of the open chain structure. Explain (a) why the cyclic forms exist

predominately in solutions, and (b) why the E-form is more abundant than the D-form.

the dependant variable is spilled water

the independent is the heat

it is a solid

explanation:

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.