Statement 1: pH of acidic solution is always below 7 at 25° C Statement 2: At 25° C, the pH of 10-8 M HCl is 8

Question

Statement 1: pH of acidic solution is always below 7 at 25° C Statement 2: At 25° C, the pH of 10-8 M HCl is 8 (A) Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1 (B) Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1 (C) Statement 1 is True, Statement 2 is False (D) Statement 1 is False, Statement 2 is True

Tardigrade Admin · Accepted Answer

(A) is correct Since Kw at 25° C =10-14 So pH of acidic solution <7 at 25° C (R) is wrong. pH of 10-8 M HCl =6.98

Q. Statement 1 : pH of acidic solution is always below $7$ at $2 5^{\circ} C$
Statement 2 : At $2 5^{\circ} C$ , the pH of $1 0^{- 8} M H Cl$ is $8$

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1

Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1

Statement 1 is True, Statement 2 is False

Statement 1 is False, Statement 2 is True

(A) is correct
Since $K_{w}$ at $2 5^{\circ} C = 1 0^{- 14}$
So $p H$ of acidic solution $< 7$ at $2 5^{\circ} C$
(R) is wrong. $p H$ of $1 0^{- 8} M H Cl = 6.98$

Q. Statement 1 : pH of acidic solution is always below 7 at 25∘C Statement 2 : At 25∘C, the pH of 10−8MHCl is 8