The odour of water can be determined by
- AThermometer
- BOsmoscopeCorrect
- CJackson’s turbid meter
- DNone of the above
Solution
Concept
Measurement instrument for odour in water
Formula
NONE
Step-by-step solution
1. The odour and taste of water are physical characteristics indicating dissolved gases or organic substances. 2. An osmoscope is an instrument specifically designed to measure odour intensity using the threshold odour number (TON). 3. Thermometers measure temperature, whereas Jackson turbidimeters are used to measure high turbidity. Answer: B
Explanation
An osmoscope is a laboratory instrument used to test and measure the intensity of odor in water samples. It operates by diluting the water sample with odor-free water until the threshold odor is barely perceptible to human smell. Thermometers measure temperature, while Jackson turbidimeters measure water clarity.
Why the other options are wrong
A) A thermometer is used to measure the temperature of water. C) Jackson's turbidimeter is used to measure the turbidity of water. D) Option B is correct because an osmoscope is used to measure odour threshold values.
Shortcut
Osmoscope measures Odour (both start with 'O').
Common mistake
Confusing an osmoscope used for determining odour with a Jackson's turbidimeter used for measuring turbidity.
Correct answer: B) Osmoscope