Question 1 of 11 The graph shows the change in temperature of a sample of water in a closed system as thermal energy is added over time. 150°C 100°C TELE Temperature (°C) 50°C 0°C -50°C 10 20 30 40 Time (min) 50 60 What happens in the water during changes of state? A. Its particles move at a lower speed B. Its particles maintain a constant speed. c. Its temperature varies constantly D. Its temperature increases slowly

c.

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.