A balloon is inflated with room- temperature air and then put in a
sunny place. The balloon expands
slightly due to a rise in
temperature.
Describe the molecules of air
inside the balloon when the
balloon is left in the sunlight as
compared to when it was first
inflated.

the answer to this question is 3.

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.