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- Subject
- Chemical Processchemical-engineering › chemical-process
- Published
- 14 Feb 2019
- Last updated
- 28 May 2026
Explanation
Permanent hardness in water is caused by calcium and magnesium salts that do not get removed by boiling. These are primarily sulphates and chlorides, unlike temporary hardness which is due to bicarbonates.
More Chemical Process MCQs
Practice related questions from the same subject.
- 1.Identify the incorrect statement from the following:
- 2.Identify the incorrect statement from the following:
- 3.Which of the following statements is accurate?
- 4.Identify the incorrect statement from the following:
- 5.What is the approximate percentage of sucrose found in cane sugar?
- 6.What is the primary purpose of using hydrated lime in the process of water treatment?
- 7.What is the chemical name of a Grignard reagent?
- 8.Which product is synthesized using acetylene and hydrochloric acid as the primary raw materials?
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