You are given an aqueous solution of nacl. the simplest method for the separation of nacl from the solution is
(a) evaporation of the solution to dryness
(b) centrifuging the solution
(c) osmosis of the solution
(d) electrolysis of the solution
(e) filtration of the solution

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

the correct answer would be b) volume versus temperature, because they are also directly proportional.