Which of the following statements about the ph scale is true?

a. acids, which have lower concentrations of hydronium ions than bases, are found from 14 and down to 7.
b. acids, which have higher concentrations of hydronium ions than bases, are found from 0 and up to 7.
c. bases, which have higher concentrations of hydronium ions than acids, are found from 14 and down to 7.
d. bases, which have higher concentrations of hydronium ions than acids, are found from 0 and up to 7.

Option (C) is the correct answer.

Explanation:

Substances which are acidic in nature have pH less than 7 whereas substances which are basic in nature have pH more than 7.

On the other hand, substances which have pH equal to 7 are neutral in nature.

An acidic substance will have more number of hydrogen ions whereas a basic substance will have more number of hydronium ions.

Therefore, we can conclude that the statement bases, which have higher concentrations of hydronium ions than acids, are found from 14 and down to 7, is true.

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.