Which statement is true for a cooling curve? a. it shows how the temperature of the substance falls as heat is removed. b. it shows how the temperature of the substance changes when heat is applied. c. it shows the increase in the average kinetic energy of the particles. d. it shows how heat absorption affects the motion of particles. e. it shows how energy gain causes the temperature to fall.

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.