The correct order of increasing prescribed limits starts with Lead (Pb) due to its high toxicity even at low levels, followed by Respirable Suspended Particulate Matter (RSPM) which has a lower limit than SPM, then Suspended Particulate Matter (SPM), and lastly Ammonia (NH3) which has a higher allowable concentration. This reflects the prioritization based on health impacts and environmental persistence.
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12 Mins English English50 Questions100 Marks60 Mins English English10 Questions20 Marks12 Mins EnglishMatch the LIST-I with LIST-II
| List – I (Waste water treatment process) | List – II (Explanation) | ||
| A. | Ozonation | I. | Removal of excess ion and manganese |
| B. | Aeration | II. | Removal of large solids |
| C. | Flocculation | III. | Disinfection |
| D. | Screening | IV. | Very small particles are clustered together |
Choose the correct answer from the options given below:
T of BTEX (Air pollutant) stands for.
Identify the major adverse impacts of SO₂ on environment:
(A) acid rain
(B) global warming
(C) ozone layer depletion
(D) incidence of respiratory disorders
Choose the correct answer from the options given below:
How many ‘core national missions’ are there in the National Action Plan on Climate Change?
Which of the following are essential components of industrial smog?
(A) Sulphur Dioxide (SO₂)
(B) Particulate matters
(C) Fly ash
(D) Soot
Choose the correct answer from the options given below:
The difference between Peak noise level (L10) and background noise level (L90) is known as:
Softening of hard water is done by:
A. Aeration
B. Boiling
C. Lime soda
D. Ozonation
E. Ion exchange
Choose the correct answer from the options given below:
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