Why does increasing the concentration of reactants increase the reaction rate? A. Some of the reactants are likely to act as catalysts. B. The temperature increases with higher concentrations. C. Collisions of the right energy are more likely. D. Increasing the concentration changes the rate constant

C. Collisions of the right energy are more likely.

Explanation:

By increasing the concentration of reactants, a higher number of reacting molecules or ions are present in the reaction. This increases the chances of collisions occurring to increase the reaction rate.

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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.