pH Scale — Homi Bhabha Exam Chemistry MCQs with Solutions
Free Homi Bhabha Exam Chemistry pH Scale MCQs with step-by-step solutions (6 questions). Part of Acids, Bases & Salts. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — pH Scale · medium · theory
The pH scale is used to measure the ______ of a solution and ranges from:
A. temperature; 0 to 100
B. acidity or basicity; 0 to 14 ✓ Correct
C. mass; 0 to 7
D. density; 1 to 10
Solution: The pH scale (0–14) indicates how acidic or basic a solution is.
Q2 — pH Scale · medium · theory
A neutral solution such as pure water has a pH of:
A. 1
B. 7 ✓ Correct
C. 14
D. 0
Solution: Pure water is neutral with pH = 7.
Q3 — pH Scale · medium · theory
A solution with a pH of 3 is:
A. neutral
B. a salt solution
C. basic
D. acidic ✓ Correct
Solution: pH less than 7 means the solution is acidic.
Q4 — pH Scale · hard · theory
Of two solutions, one has pH 2 and the other pH 5. The more acidic solution is the one with pH:
A. 5
B. neither is acidic
C. both are equal
D. 2 ✓ Correct
Solution: Lower pH means greater acidity, so pH 2 is more acidic than pH 5.
Q5 — pH Scale · hard · theory
A solution turns red litmus blue. Its pH is most likely:
A. exactly 0
B. greater than 7 ✓ Correct
C. less than 7
D. exactly 7
Solution: Turning red litmus blue indicates a base, which has pH greater than 7.
Q6 — pH Scale · medium · theory
The pH of human blood is close to:
A. 0
B. 12 (strongly basic)
C. 2 (strongly acidic)
D. 7.4 (slightly basic) ✓ Correct
Solution: Blood is maintained at a slightly basic pH of about 7.4.