PH, an important water quality parameter,

1.Is a measure of acidity in water.

2.Is a measure of basicity in water.

3.Can have a value only up to 10.

4.Represents the concentration of hydrogen ions.

5.Whose value 0 confirms that the water is potable.

A1, 3 & 5 only

B1, 2 & 4 only ✓ Correct

C3, 4 & 5 only

D2, 3 & 5 only

Correct answer: (B) 1, 2 & 4 only

Explanation

pH measures both acidity and basicity and reflects the concentration of hydrogen ions.

Statement 1 is correct, as pH indicates how acidic water is.

Statement 2 is correct, as pH equally indicates basicity or alkalinity.

Statement 3 is wrong, since pH ranges from 0 to 14, not only up to 10.

Statement 4 is correct, as pH represents hydrogen-ion concentration.

Statement 5 is wrong, since a pH of 0 is strongly acidic and unfit to drink.

Neutral water sits at pH 7, with drinking water usually kept near neutral.

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