1. Which of the following types of coal contains higher percentage of volatile matter?

(A) Peat
(B) Lignite
(C) Bituminous
(D) Anthracite

2. Carbon dioxide evolved from soil mainly comes from

(A) Microbial respiration
(B) Root respiration
(C) Soil animals respiration
(D) All the above

3. Which one of the following pesticides persists for a long period in soil?

(A) Lindane
(B) Monocrotophos
(C) Carbaryl
(D) Parathion

4. Organic matter (OM) content of soil can be calculated from organic carbon (OC) by using the formula

(A) OM (%) = OC (%) × 1.724
(B) OM (%) = OC (%) × 1.247
(C) OM (%) = OC (%) × 1.472
(D) OM (%) = OC (%) × 1.427

5. The problem of thermal pollution can be alleviated by using

(A) Cooling ponds
(B) Cooling towers
(C) More efficient electricity generating plants
(D) All the above

6. According to Recycled Plastics (Manufacture and Usage) Rules 1999, the minimum thickness of carry bags shall not be less than

(A) 10 microns
(B) 20 microns
(C) 30 microns
(D) 50 microns

7. Match the Act mentioned in Column – I with the year of enactment mentioned in Column – II:

Column – I                                                                            Column – II
(i) The Water (Prevention and Control of Pollution) Act       1. 2002
(ii) The Air (Prevention and Control of Pollution) Act           2. 1986
(iii) The Environmental (Protection) Act                               3. 1974
(iv) The Biological Diversity Act                                           4. 1981

Choose the correct code:

      (i)        (ii)       (iii)      (iv)
(A) 1          4          3        2
(B) 3          4          2        1
(C) 3          2         1        4
(D) 2         4          3        1

8. Which one of the following is not an energy recovery method of solid waste management?

(A) Pelletisation
(B) Biomethanation
(C) Pyrolysis
(D) Composting

9. The colour code of the container for collection of waste scrap generated from Hospitals is

(A) Red
(B) Blue
(C) White
(D) Green

10. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R) :

Assertion (A): When quantitative probabilistic risk assessment is performed on hazardous waste sites they usually turn out to be of relatively low threats.

Reason (R): In hazardous waste sites the chance of exposure is low because of isolation of drinking water supplies and prevention of access.

Choose the correct answer:

(A) Both (A) and (R) are true and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(C) (A) is true, but (R) is false.
(D) (A) is false, but (R) is true.