11 Questions
What is the principle behind Atomic Absorption Spectrometry?
Atoms in the ground state absorb light of a particular wavelength
What is the purpose of adding a DPD no. 1 tablet to a swimming pool water sample?
To determine the concentration of free chlorine
What is the unit of measurement for Biochemical Oxygen Demand (BOD)?
ppm
What is the purpose of the Winkler Titration?
To find the concentration of dissolved oxygen (O₂) in a water sample
What is the purpose of adding ammonium molybdate in anion testing for phosphate?
To produce a yellow precipitate
What is the principle behind pH measurement using Universal indicator paper?
The colour of the paper changes according to the pH of the sample
What is the physical state of the atoms that absorb radiation in Atomic Absorption Spectrometry?
Ground state
What is the duration for which a water sample is kept in the dark for the Biochemical Oxygen Demand (BOD) test?
5 days
What is the colour of the product formed when free chlorine oxidizes DPD in a swimming pool water sample?
Red
What is the temperature at which the Biochemical Oxygen Demand (BOD) test is conducted?
20°C
Which of the following methods is used to measure the concentration of dissolved oxygen in a water sample?
Winkler Titration
Test your knowledge on water analysis, including pH measurement using universal indicator paper and pH meter. Also, learn about the principles of Atomic Absorption Spectrometry, a technique used to measure the concentration of elements.
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