The molecules in a sample of oxygen gas are in constant motion. what does an increase in temperature indicate about the movement of the molecules?
a. the molecules are moving closer together.
b. the molecules are moving farther apart.
c. the molecules are moving faster.
d. the molecules are moving slower.

C.The molecules are moving faster- Correct answer

a electronegativity decreases beacuse the size of nucleus is bigger.

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.