What happens if the spots are made too large when preparing a TLC plate for development? 1. The spots will be difficult to see after development. 2. The spots will saturate the plate, show tailing, and/or diffuse into one another. 3. The spot material will dissolve off the plate. 4. Additional spots will appear on the plate, interfering with analysis.

4

explanation:

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.