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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Q. Presence of high concentration of ozone and smog in atmospheric air causes the

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Q. Algae growth in water is controlled by

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Q. __________ is removed from water by lime-soda process.

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Q. Green house effect is accentuated by

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Q. Thermal pollution due to excessive heat & temperature in the working place causes

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Q. High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes

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Q. World environment day is observed every year on the 5th of

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Q. The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

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