Question : The hardness of the water is commonly measured in terms of:
Option 1: calcium carbonate equivalents
Option 2: calcium sulphate equivalents
Option 3: magnesium carbonate equivalents
Option 4: magnesium sulphate equivalents
Correct Answer: calcium carbonate equivalents
Solution : The correct answer is calcium carbonate equivalents.
The hardness of water is typically expressed in parts per million (ppm) and evaluated in terms of calcium carbonate due to the high molecular weight of calcium carbonate (100 g/mol) and the fact that it is simpler to compute values with 100 than it is to do so for other agents that contribute to water hardness.
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Question : Which among the following combinations is present in higher amounts in hard water?
Option 1: Calcium and Magnesium
Option 2: Calcium and Sodium
Option 3: Sodium and Magnesium
Option 4: Sodium and Manganese
Question : Which of the following is a major component of water pollution in the Bengal Basin?
Option 1: Chromium
Option 2: Arsenic
Option 3: Calcium
Option 4: Potassium
Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:
Option 1: 5 : 2
Option 2: 2 : 5
Option 3: 3 : 5
Option 4: 5 : 3
Question : Nitrogen in water is commonly found in the form of:
Option 1: Nitrous oxide
Option 2: Nitrate
Option 3: Nitric oxide
Option 4: Nitrite
Question : Select the option in which all the words are spelt correctly.
Option 1: Ritu is defecient in calcium.
Option 2: Ritu is deficient in calcium.
Option 3: Ritu is defisient in calcium.
Option 4: Ritu is daficient in calcium.
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