Consider the two solvent systems used to elute your tlc plates.
a) which solvent system is more polar, 1: 4 or 1: 9 ethyl acetate: hexanes?
b) compare the rf values of each compound eluted in 1: 4 vs 1: 9 ethyl acetate: hexanes. is there a general trend for the change in rf values of each compound? if so, what is it (for example, always larger in 1: 4 than 1: 9, or always smaller in 1: 4 than 1: 9)? if there is no general trend, summarize the results for each compound.
c) explain any trends in compound rf values as a function of solvent system that you identified in part (b). hint: your answer to part (a) should be incorporated in your explanation.

You see, Here is the problem. I do not know the answer but, I need more points so I am really sorry for the inconvenience. But for A the answer is 1:9 and for b there is not trend.

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%

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: