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UPSC Exam  >  UPSC Tests  >  Science & Technology for UPSC CSE  >  Test: Hardness of Water, Acids, Bases & Salts - UPSC MCQ

Test: Hardness of Water, Acids, Bases & Salts - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Hardness of Water, Acids, Bases & Salts

Test: Hardness of Water, Acids, Bases & Salts for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Hardness of Water, Acids, Bases & Salts questions and answers have been prepared according to the UPSC exam syllabus.The Test: Hardness of Water, Acids, Bases & Salts MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Hardness of Water, Acids, Bases & Salts below.
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Test: Hardness of Water, Acids, Bases & Salts - Question 1
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What is the main cause of temporary hardness in water?

Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 1
Temporary hardness in water is caused by the presence of bicarbonates of calcium and magnesium. When water with temporary hardness is boiled, these bicarbonates decompose and are precipitated as carbonates.
Test: Hardness of Water, Acids, Bases & Salts - Question 2
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Which process involves the use of Permutit, an artificial zeolite, for softening water?

Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 2
The Permutit Process uses an artificial zeolite called Permutit, which is a type of ion exchange resin, to remove hardness ions from water.
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Test: Hardness of Water, Acids, Bases & Salts - Question 3
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Which of the following is NOT a characteristic of acids?

Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 3

Acids typically have a sour taste, not a bitter taste. They release hydrogen ions (H+) in water and can react with metals to form salts.

Test: Hardness of Water, Acids, Bases & Salts - Question 4
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Which of the following substances is a base?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 4
Sodium hydroxide (NaOH) is a strong base, while hydrochloric acid and vinegar are acids. Lemon juice contains citric acid, making it acidic.
Test: Hardness of Water, Acids, Bases & Salts - Question 5
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What is the pH value of pure water?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 5
The pH value of pure water is 7, which is considered neutral on the pH scale. Values below 7 are acidic, and values above 7 are alkaline.
Test: Hardness of Water, Acids, Bases & Salts - Question 6
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Which type of salt is formed when all the replaceable hydrogen atoms in an acid are replaced by a metal ion?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 6
When all the replaceable hydrogen atoms in an acid are replaced by a metal ion, the salt formed is called a normal salt.
Test: Hardness of Water, Acids, Bases & Salts - Question 7
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What is the process of joining two metal surfaces by melting them and then fusing them together called?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 7
Welding is the process of joining two metal surfaces by melting them and fusing them together. Soldering is a different process that uses a lower-temperature filler material.
Test: Hardness of Water, Acids, Bases & Salts - Question 8
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Which type of change is characterized by being temporary and easily reversible?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 8
A physical change is temporary and can be easily reversed without the formation of a new substance.
Test: Hardness of Water, Acids, Bases & Salts - Question 9
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Which of the following substances is an example of a suspension?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 9
Milk of magnesia is an example of a suspension because it contains solid particles (magnesium hydroxide) dispersed in a liquid.
Test: Hardness of Water, Acids, Bases & Salts - Question 10
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Which type of water is characterized by producing lather with soap very easily?
Detailed Solution for Test: Hardness of Water, Acids, Bases & Salts - Question 10
Soft water is characterized by producing lather with soap very easily, unlike hard water which does not produce lather easily.
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