which of the following is not a unit of hardness?
Answers
Answer:
Degree centigrade is not a unit of hardness. Degree centigrade is the unit of temperature. The unit for hardness is ppm (parts per million), degree clarke and degree french.
Complete Question:
Which of the following is not a unit of hardness?
A. parts per million
B. degree centigrade
C. degree clarke
D. degree french
Answer:
Degree centigrade is not a unit of hardness.
Explanation:
Degree centigrade:
- The degree Celsius is not a measure of hardness.
- Water freezes at 0 degrees on the centigrade scale of temperature, which has a boiling point of 100 degrees.
- Because of the 100-degree difference between the designated points, Celsius is also known as the centigrade scale and is denoted by the symbol °C.
Explanation for incorrect answer:
Degree Clarke:
One grain (64.8 mg) of CaCO3 per Imperial gallon (4.55 litres) of water, or 14.254 ppm, is the definition of a Clark degree (°Clark).
Degree French
The definition of a French degree (°F or f) is 10 mg/L CaCO3, or 10 ppm. A general hardness level is 10 mg CaO/L, or 17.85 ppm (mg CaCO3/L), of general hardness.
Parts per million:
The amount of units of mass of a contaminant per million units of total mass is known as parts per million (ppm).
Final answer:
Degree centigrade is not a unit of hardness. The temperature is measured in degrees Celsius. Parts per million (ppm), degree clarke, and degree french are the units for hardness. These three units are connected to one another.
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