Q. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

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Q. The earth's atmosphere is an envelope of gases present upto a height of about __________ kms.

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Q. Which of the following is an adsorbant used for the removal of SO₂ from gas/air ?

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Q. Which of the following is the most widely used disinfectant in water treatment ?

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Q. Pick out the wrong statement

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Q. Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

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Q. 5-200 μm size particles are called

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Q. The progressive warming up of the earth's surface is mainly due to the

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Q. Higher concentration of nitrogen dioxide in atmospheric air causes

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Q. Ozone is

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Q. The permissible color for domestic water supply is __________ ppm.

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Q. High noise levels produced during operation of fans and compressors can be reduced by using

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Q. The Killer gas which caused Bhopal gas tragedy in 1984 was

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Q. In the context of the chemical process industries, the term BOD is normally associated with the

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Q. Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

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Q. Inhalation of silica dust causes a disease called

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Q. Solid content in most of the domestic sewage is about __________ percent.

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Q. In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

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Q. Pick out the wrong statement.

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Q. Which of the following is not an air pollutant ?

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