Q139 / 270 · NDA 2017 (Phase 2) · General Ability

The desirable range of pH for drinking water is

Correct answer
A
6.5 to 8.5
B
5.0 to 6.5
C
6.5 to 7.0
D
7.0 to 8.5

Solution

The pH of pure water is 7 . The normal range for pH in surface water systems is 6.5 to 8.5 , and the pH range for groundwater systems is between 6 to 8.5 .

Hence, the correct answer is option: 'A'.

Relevant Questions

If is the number of electrons and is the number of nucleons present in , then which one of the following is correct?2026 (Phase 1)Chemistry
Which one of the following forms of carbon is thermodynamically most stable?2026 (Phase 1)Chemistry
Consider the following statements: I. A colloid and a suspension are heterogeneous mixtures. II. Colloids can be separated from the mixture 2026 (Phase 1)Chemistry
A non-volatile solid solute may be separated from a solution by which of the following processes? I. Evaporation II. Crystallization Select 2026 (Phase 1)Chemistry
Which of the following are oxidation reactions? I. Rusting of iron II. Burning of fuel III. Rancidity of oils and fats IV. Browning of fruit2026 (Phase 1)Chemistry
Consider the following statement: 'Acids are substances that dissociate in water to give hydrogen ions (aq), and bases are substances that p2026 (Phase 1)Chemistry