Question : The ______ is the most common unit for measuring ozone concentration.
Option 1: Dobson unit
Option 2: chain
Option 3: rod
Option 4: statute mile
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Correct Answer: Dobson unit
Solution : The correct answer is the Dobson Unit.
The most widely used unit for calculating ozone levels is the Dobson Unit. The amount of ozone molecules needed to produce a layer of pure ozone that is 0.01 millimetres thick at 0 degrees Celsius and 1 atmosphere (the Earth's surface air pressure) is known as a Dobson Unit.
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Question : What is the SI unit for measuring the luminous intensity?
Option 1: Ampere
Option 2: Mole
Option 3: Candela
Option 4: Kelvin
Question : Which of the following statements is true?
Option 1: Lead is the most common pollutant of automobile exhaust.
Option 2: The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin compared to oxygen.
Option 3: Photochemical smog always contains ozone.
Option 4: All options are correct.
Question : Select the most appropriate option to fill in the blank. The doorbell interrupted ______ chain of thoughts.
Option 1: my
Option 2: us
Option 3: me
Option 4: mine
Question : Which apparatus is used in the laboratory for measuring the heat capacity of a substance?
Option 1: Manometer
Option 2: Hygrometer
Option 3: Colorimeter
Option 4: Calorimeter
Question : Which among the following is not a fundamental SI unit?
Option 1: Candela
Option 2: Kelvin
Option 3: Tesla
Option 4: Ampere
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