Q. Which of the following is the most lethal water pollutant ?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Pick out the wrong statement

View solution

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

View solution

Q. 5-200 μm size particles are called

View solution

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

View solution

Q. Higher concentration of nitrogen dioxide in atmospheric air causes

View solution

Q. Ozone is

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. Inhalation of silica dust causes a disease called

View solution

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

View solution

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.)

View solution

Q. Pick out the wrong statement.

View solution