Rank the following groups in terms of their priority according to the Cahn-Ingold-Prelog system of priorities. Give the highest ranking group a priority of 1 and the lowest ranking group a priority of 4.
a. D
b. H
c. NH2
d. CH2OH

Explanation:

Cahn, Ingold, and Prelog formulated a rule to specify the arrangement of the atoms or groups that are present in an asymmetric molecule. This rule is called a Cahn-Ingold-Prelog system. This system is generally used in the R, S system of nomenclature.

          According to this rule, such an atom that is directly linked to the asymmetric carbon atom is given the highest priority that has the highest atomic number. So here  Nitrogen atom of molecule is given the highest priority because Nitrogen has 7 atomic numbers. Carbon atom of molecule  has 6 atomic number. So it is given 2nd position. Deuterium and Hydrogen have 2 and 1 atomic numbers respectively so the are given 3rd and 4th order respectively.                                                                                                                  

here we have to get the change of moles on decrease the volume of the reaction in gas phase.

the   per the given options it will decrease by (d) 11-50%

we know, on decreasing the volume of the gas phase reaction the reaction moves to the product side.

the reaction:                     so₂cl₂ (g) = so₂ (g) + cl₂ (g)         total

the moles at equilibrium:   1 - α                 α               α           = 1+α

concentrations:                   1 - α               α               α           = 1 + α

(concentration = moles/volume, as volume is 1 l)

(where α is the degree of dissociation)

now the dissociation constant in terms of concentration is :

=  

or,

or,   = (at v = 1l)

the reaction:                     so₂cl₂ (g) = so₂ (g) + cl₂ (g)         total

the moles at equilibrium:   1 - α                 α               α           = 1+α

concentrations:               (1 - α)/0.5           α/0.5         α/0.5       = (1 + α)/0.5

thus, the dissociation constant in terms of concentration is :

or,  

=  

so, the change of 1 : 1/0.5

or, 1: 2

thus it will decrease by 50%.

or, as per the given options it will decrease by 11-50%

output?

explanation: