Among the following
(a) On dilution the `P^(H) ` of an acid increases
(b) A solution with` P^(H) ` = 5 is 100 times more basic than a solution with ` p^(H) ` =3
(3) A solution with `P^(H) ` =8 is 1000 times more acidic than a solution with `P^(H) ` =11
(4) The `P^(H) of 10 ^(-9) ` M KOH is slightly greater than

Options

A. All are correct
B. 1, 4 are only correct
C. 1,2,3 are only correct
D. All are wrong

Answer

A

Explanation

on dilution , pH increase for acid
(b) pH `= 5 rArr [H^(+) ] = 10 ^(-5) `
` pH = 11 rArr [H^(+) ] = 10 ^(-3) `
`therefore 100 `times more basic
( c ) `pH = 8 rArr [H^(+) ] = 10 ^(-8) `
` pH = 11 rArr [H^(+) ] =10 ^(-11) `
`therefore 100 `times more acidic
(d) KOH is basic ` 10 ^(-9) ` M KOH
`rArr pH gt 7` but slightly greater