Question

32. Which is true for the pH of 10-3 M aqueous solution?
(1) HCI is 11 (2) NaOH is 3 (3) KOH is 11
(4) KCl is 11​

Answer 1

Answer:

2) NaOH is 11

It is basic in nature ....

Answer 2

Hey !

For $10^{-3}$ M aqueous solution,

i.e., concentration of 0.001 M

Tip: Note the nature of solution and Range of pH and compare it with given pH value.


Range of pH :

Acidic => 1 to 6 => pH < 7

Neutral => 7 => pH = 7

Basic => 8 to 14 => pH > 7



Now,

- HCL => Strong acid

=> pH < 7

Given pH = 11 .

(1) is False.



- NaOH => Strong Base

=> pH > 7

Given pH is 3

(2) is also false



- KOH => Strong Base

=> pH > 7

Given, pH = 11.

(3) is True.



- KCL => Netral Salt

=> pH = 7

Given, pH = 11

(4) is False




So, Option - (3) is correct.



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