Which of the following statements about pH is correct?
hard Q10 of 15
General Science - Physics (Basics)
Which of the following statements about pH is correct?
ApH of neutral solution is exactly 7 at 25°C
BpH of acidic solution is greater than 7
CpH scale ranges from 1 to 14
DpH of basic solution is less than 7
Step-by-Step Solution
Step 1: Recall pH scale facts
The pH scale ranges from 0 to 14, indicating acidity or alkalinity.
Step 2: Analyze each statement
Acidic solutions have pH less than 7, neutral solution has pH exactly 7 at 25°C, and basic solutions have pH greater than 7. The pH scale starts at 0, not 1.
Step 3: Identify correct statement
The statement 'pH of neutral solution is exactly 7 at 25°C' is correct. Acidic solutions have pH less than 7, the pH scale ranges from 0 to 14, and basic solutions have pH greater than 7.
Final Answer:
pH of neutral solution is exactly 7 at 25°C → Option A
Quick Check:
Neutral solution pH = 7 at 25°C ✅
Quick Trick:Neutral pH is 7 at room temperature.
Common Mistakes:
Confusing pH ranges and scale limits.
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