SawaalBoxसवाल बॉक्स

Pollution & Waste Management

38 questions in Environment & Ecology.

Asked in 2013, 2012, 2011, 2010, 2003, 1997, 1995

2012 · Q17Environment & EcologyPollution & Waste Managementmoderate

Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used 1. in the production of plastic foams 2. in the production of tubeless tyres 3. in cleaning certain electronic components 4. as pressurizing agents in aerosol cans Which of the statements given above is/are correct?

  1. (a)1, 2 and 3 only
  2. (b)4 only
  3. (c)1, 3 and 4 only
  4. (d)1, 2, 3 and 4
Show answerHide answer

Official answer(c) 1, 3 and 4 only

2011 · Q9Environment & EcologyPollution & Waste Managementmoderate

The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?

  1. (a)Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons
  2. (b)Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons
  3. (c)Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons
  4. (d)Increased temperature at polar region due to global warming
Show answerHide answer

Official answer(b) Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons

2003 · Q106Environment & EcologyPollution & Waste Managementmoderate

Assertion (A): Coal-based thermal power stations contribute to acid rain. Reason (R): Oxides of carbon are emitted when the coal burns.

  1. (a)Both A and R are individually true and R is the correct explanation of A
  2. (b)Both A and R are individually true but R is NOT the correct explanation of A
  3. (c)A is true but R is false
  4. (d)A is false but R is true
Show answerHide answer

Official answer(b) Both A and R are individually true but R is NOT the correct explanation of A

1995 · Q128Environment & EcologyPollution & Waste Managementmoderate

“The final Agent Orange raid in Vietnam took place in 1970…. areas have begun to bloom again. But 19 years after the war’s end, it seems plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fall-out from those clouds ... is a crop of human miseries including cancers, miscarriages and birth defects — that may persist for decades.” The offensive substance referred to in the above quotation is

  1. (a)DDT used as insecticide
  2. (b)a complex mixture of herbicides and weedicides used to increase agricultural output in the then South Vietnam under the US aid programme
  3. (c)a complex mixture of DDT and other insecticides used as aerial sprays for protection against malaria and other tropical diseases
  4. (d)dioxin used as defoliants
Show answerHide answer

Official answer(d) dioxin used as defoliants

1995 · Q145Environment & EcologyPollution & Waste Managementmoderate

Consider the table given below providing details of traffic volume per hour for four locations (showing total traffic volume, % of heavy vehicles, average noise level in dB(A) and noise-pollution level in dB(A)). When the total traffic volume is the same, the factor(s) which affect(s) the noise-pollution level is/are

  1. (a)% of heavy vehicles
  2. (b)noise-pollution level and average noise level
  3. (c)average noise level and % of heavy vehicles
  4. (d)indeterminable on the basis of details given
Show answerHide answer

Official answer(a) % of heavy vehicles