Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Which one of the following tests of water/ wa...
Start Learning for Free
Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?
- a)Hardness
- b)COD
- c)Residual chlorine
- d)DO
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Which one of the following tests of water/ wastewater employs Erichrom...
The correct answer is option 'A', Hardness.
Erichrome Black T is a dye that is commonly used as an indicator in the determination of total hardness in water and wastewater samples. Hardness is a measure of the concentration of calcium and magnesium ions in water, and it is typically expressed as mg/L or ppm. The Erichrome Black T test is a simple, fast, and inexpensive method for determining total hardness in water and wastewater samples. It works by adding a small amount of Erichrome Black T dye to a water sample and then observing the color change. The intensity of the color change is directly proportional to the concentration of calcium and magnesium ions in the water. This test is widely used in the field of water treatment and quality control.
Most Upvoted Answer
Which one of the following tests of water/ wastewater employs Erichrom...
Answer:
Erichrome Black T is an indicator that is commonly used in the determination of water hardness. The indicator forms a complex with metal ions, particularly calcium and magnesium ions, which are the main contributors to water hardness.
Water Hardness Test:
Water hardness refers to the concentration of calcium and magnesium ions present in water. It is an important parameter to assess the quality of water, as high levels of hardness can cause scaling and other problems in water distribution systems and household appliances.
To determine water hardness, a sample of water is titrated with a solution of Erichrome Black T indicator. The indicator changes color when it reacts with the calcium and magnesium ions present in the water. The endpoint of the titration is reached when the color of the indicator changes from blue to pink or purple. The volume of the titrant solution required to reach the endpoint is then used to calculate the hardness of the water.
Other Tests:
a) COD (Chemical Oxygen Demand): COD is a measure of the amount of oxygen required to chemically oxidize organic and inorganic compounds in water. Erichrome Black T is not used as an indicator in COD tests.
b) Residual Chlorine: Residual chlorine is the amount of chlorine remaining in water after disinfection. Erichrome Black T is not used as an indicator in residual chlorine tests.
c) DO (Dissolved Oxygen): DO is a measure of the amount of oxygen dissolved in water. Erichrome Black T is not used as an indicator in DO tests.
Therefore, the correct answer is option 'A' - Hardness. Erichrome Black T is commonly employed as an indicator in water hardness tests.
Erichrome Black T is an indicator that is commonly used in the determination of water hardness. The indicator forms a complex with metal ions, particularly calcium and magnesium ions, which are the main contributors to water hardness.
Water Hardness Test:
Water hardness refers to the concentration of calcium and magnesium ions present in water. It is an important parameter to assess the quality of water, as high levels of hardness can cause scaling and other problems in water distribution systems and household appliances.
To determine water hardness, a sample of water is titrated with a solution of Erichrome Black T indicator. The indicator changes color when it reacts with the calcium and magnesium ions present in the water. The endpoint of the titration is reached when the color of the indicator changes from blue to pink or purple. The volume of the titrant solution required to reach the endpoint is then used to calculate the hardness of the water.
Other Tests:
a) COD (Chemical Oxygen Demand): COD is a measure of the amount of oxygen required to chemically oxidize organic and inorganic compounds in water. Erichrome Black T is not used as an indicator in COD tests.
b) Residual Chlorine: Residual chlorine is the amount of chlorine remaining in water after disinfection. Erichrome Black T is not used as an indicator in residual chlorine tests.
c) DO (Dissolved Oxygen): DO is a measure of the amount of oxygen dissolved in water. Erichrome Black T is not used as an indicator in DO tests.
Therefore, the correct answer is option 'A' - Hardness. Erichrome Black T is commonly employed as an indicator in water hardness tests.
Attention Civil Engineering (CE) Students!
To make sure you are not studying endlessly, EduRev has designed Civil Engineering (CE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Civil Engineering (CE).
|
Explore Courses for Civil Engineering (CE) exam
|
|
Top Courses for Civil Engineering (CE)View all
Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer?
Question Description
Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer?.
Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which one of the following tests of water/ wastewater employs Erichrome Black T as an indicator ?a)Hardnessb)CODc)Residual chlorined)DOCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup