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Chemical Engineering - Environmental Engineering

Exercise : Environmental Engineering - Section 3
36.
Pick out the correct statement.
Deforestation helps in controlling the green house effect.
Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
Lightening discharges are natural source of production of SO2 & H2S pollutant.
Sulhur dioxide causes death by asphyxiation.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Which of the following is not a source of ozone emission in the atmosphere ?
Refrigerators.
Xerox machines.
Dermatological photo-therapy equipments.
High voltage electrical equipments.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
forestation
rain
green house effect
vegetation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Pick out the correct statement.
Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water.
COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time.
COD is related to BOD of a given waste in water but the relationship varies for different wastes. Typically COD of potable water may be 1-2 mg/litre.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The upper layer of atmosphere is called the
stratosphere
troposphere
ionosphere
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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