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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  Environmental Engineering  >  Test: Chemical Characteristics Of Water - Civil Engineering (CE) MCQ

Test: Chemical Characteristics Of Water - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Environmental Engineering - Test: Chemical Characteristics Of Water

Test: Chemical Characteristics Of Water for Civil Engineering (CE) 2024 is part of Environmental Engineering preparation. The Test: Chemical Characteristics Of Water questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Chemical Characteristics Of Water MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemical Characteristics Of Water below.
Solutions of Test: Chemical Characteristics Of Water questions in English are available as part of our Environmental Engineering for Civil Engineering (CE) & Test: Chemical Characteristics Of Water solutions in Hindi for Environmental Engineering course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Chemical Characteristics Of Water | 10 questions in 25 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Environmental Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Chemical Characteristics Of Water - Question 1
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Chlorides are estimated by titration with a standard silver nitrate solution by using _______as indicator.

Detailed Solution for Test: Chemical Characteristics Of Water - Question 1

Explanation: 2-3 drops of potassium chromate are added to appropriate amount of water sample and then it is titrated with a standard solution of silver nitrate.

Test: Chemical Characteristics Of Water - Question 2
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State whether the following statement is True or False.
Carbonate hardness can be removed by adding lime to water. 

Detailed Solution for Test: Chemical Characteristics Of Water - Question 2

Explanation: Carbonate hardness is due to the presence of carbonates and bicarbonates of calcium and magnesium in water and can be removed by boiling or by adding lime to it.

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Test: Chemical Characteristics Of Water - Question 3
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Which of the following statement is wrong regarding permanent hardness?

Detailed Solution for Test: Chemical Characteristics Of Water - Question 3

Explanation: Permanent hardness is called non-carbonate hardness whereas temporary hardness is called carbonate hardness.

Test: Chemical Characteristics Of Water - Question 4
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One degree of hardness is equivalent to ___ ppm
Detailed Solution for Test: Chemical Characteristics Of Water - Question 4

Explanation: Water is said to have one degree of hardness when its soap destroying power is equivalent to the effect of 14.25mg of calcium carbonate in one litre of water.

Test: Chemical Characteristics Of Water - Question 5
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What can be filled in place of the question mark in the above table?
Detailed Solution for Test: Chemical Characteristics Of Water - Question 5

Explanation: When the degree of hardness is 9, then it indicates the hard water. For excessive hard water, it is 15 and for very hard water, it is 11.

Test: Chemical Characteristics Of Water - Question 6
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In which method of determining total hardness of water is based on the premise that hardness producing substance react with soap and form insoluble compounds before lather is produced?
Detailed Solution for Test: Chemical Characteristics Of Water - Question 6

Explanation: In Clark’s method, total hardness is found by determining the standard soap solution required to obtain permanent lather with the water sample of known volume.

Test: Chemical Characteristics Of Water - Question 7
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What is the indicator used in EDTA method?
Detailed Solution for Test: Chemical Characteristics Of Water - Question 7

Explanation: Hardness is determined by using Ethylene diamine tetra-acetic acid using Erio chrome, black T as indicator at a pH between 8.5 and 11.

Test: Chemical Characteristics Of Water - Question 8
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 The permissible limit of pH preferred for potable water is ___ppm.
Detailed Solution for Test: Chemical Characteristics Of Water - Question 8

The permissible limit of pH for potable water should not exceed 9 and should not be less than 6.5 and the preferred limit is 7-8.5.

Test: Chemical Characteristics Of Water - Question 9
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Given list 1 and list 2, find which of the following pair is correctly matched?
Detailed Solution for Test: Chemical Characteristics Of Water - Question 9

Explanation: Lead has a permissible limit of 0.05ppm, phenol has 0.001ppm, zinc has 5ppm and chromium has a permissible limit of 0.05ppm in water.

Test: Chemical Characteristics Of Water - Question 10
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What is the concentration of H+ ions in moles/L in water if the pOH value is 6? 
Detailed Solution for Test: Chemical Characteristics Of Water - Question 10

Explanation: pH + pOH = 14
pOH = 6, so pH = 14-6= 8
H+ = 10-pH = 10-8moles/L.

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