📣 Paper 3 has been removed from NET from 2018 (Notification)- now paper 2 and 3 syllabus is included in paper 2. Practice both paper 2 and 3 from past papers.

NTA NET 2020 Environmental Sciences 29 September Evening Shift Part 1

Online Paper 1 complete video lectures with Dr. Manishika Jain. Join now!

Q 1. The Environmental Relief fund was created under:

1. Environmental Protection Act

2. Forest Conservation Act

3. Public Liability Insurance Act

4. Wildlife Protection Act

Q. 2 Match List l (Analysis) with List II (Analytical techniques)

Table Shows Analysis and Analytical Techniques
List IList II
AnalysisAnalytical techniques
A. To analyze organic compounds of pollutantsI. SEM
B. To analyze the elemental composition of pollutantsII. XRD
C. Morphological analysis of pollutantsIII. FTIR
D. To analyze crystalline materials of pollutantsIV. XRF

Choose the correct answer from the options given below

1. A-III, B-II, C-IV, D-I

2. A-IV, B-III, C-I, D-II

3. A- III, B - IV, C- I, D-II

4. A- IV, B- III, C-II, D-I

Q. 3 Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R Assertion A: Isomorphous substitution is the source of constant charges on soil silicate clays.

Reason R: Cations of comparable size substitute each other in respective tetrahedral and octahedral sheets in silicate clays.

In light of the above statements, choose the correct answer from the options given below

1. Both A and R are true and R is the correct explanation of A

2. Both A and R are true but R is NOT the correct explanation of A

3. A is true but R is false

4. A is false but R is true

Q. 4 Soil humic acids are

1. Insoluble in alkali

2. Insoluble in acid

3. Soluble in acid

4. Insoluble in both acid and alkali

Q 5. Which among the following is short-lived species in the atmosphere?

1.

2. CO

3.

4. OH radical

Q. 6 Basel convention (1989) was designed to:

1. Reduce global waste generation

2. Control hazardous waste generation

3. Determine safe handling measures for hazardous waste

4. Prevent trans-boundary movement of hazardous waste between nations

Q 7. At 1 atm pressure and temperature, concentration of 80 ppb is equivalent to

1.40

2.160

3.240

4.150. 4

Q. 8 Given below are two statements:

Statement I: Many bacteria carry plasmids, which are much smaller pieces of DNA, also circular, and self- replicating.

Statement II: Plasmids are vitally important in the context of the environmental biotechnology in that they frequently carry the genes for Degradative pathways.

In light of the above statements, choose the most appropriate answer from the options given below

1. Both Statement I and Statement II are correct

2. Both Statement I and Statement II are incorrect

3. Statement I is correct but Statement II is incorrect

4. Statement I is incorrect but Statement II is correct

Q. 9 Given below are two statements.

Statement I: Cyclonic wind flow in the northern hemisphere is counter-clockwise.

Statement II: If you stand with your back to the wind in the northern hemisphere, low pressure will be to your left and high pressure will be to your right.

In light of the above statements, choose the most appropriate answer from the options given below

1. Both Statement I and Statement II are correct

2. Both Statement I and Statement II are incorrect

3. Statement I is correct but Statement II is incorrect

4. Statement I is incorrect but Statement II is correct

Q. 10 Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R

Assertion A: Regression analysis is suitable for two variables having linear causal relationship between them.

Reason R: The causal relationship between two variables is never curvilinear.

In light of the above statements, choose the most appropriate answer from the options given below

1. Both A and R are correct and R is the correct explanation of A

2. Both A and R are correct but R is NOT the correct explanation of A

3. A is correct but R is not correct

4. A is not correct but R is correct

Q. 11 Heteromorphic rocks have

1. Same mineral composition arising from similar magmas under different conditions of crystallization.

2. Different mineral composition arising from similar magmas under different conditions of crystallization.

3. Different mineral composition arising from different magmas under different conditions of crystallization.

4. Same mineral composition arising from different magmas under different conditions of crystallization.

Q. 12 Diesel Exhaust Particles (DEP) , known to manifest asthma-like features, are responsible for

A. Chronic airway inflammation

B. Mucus hypersecretion

C. Airway expansion

D. Marked infiltration of eosinophils

E. Airway hyper responsiveness

Choose the correct answer from the options given below

1. A, C, D and E only

2. A, B, C and D only

3. A, B, D, and E only

4. B, C, D and E only

Q. 13 Consider the following statements regarding the phytoremediation of metal contaminated sites:

A. Natural abilities of certain plant species are utilized to remove or stabilize toxic metals.

B. Certain species termed hyper accumulators can adsorb 50 - 100 times larger amounts of metals compared to most ordinary plants.

C. The best candidates for removal by phytoremediation are arsenic and cadmium

D. The harvested hyper accumulating plants can be recycled in agriculture

Choose the correct answer from the options given below

1. A only

2. A and B only

3. A, B, and C only

4. A, C, and D only

Q. 14 According to National Ambient Air Quality Standards (NAAQS) , the annual limits for and in ecologically sensitive areas (in ) are

1.100 and 60, respectively

2.60 and 40, respectively

3.40 and 20, respectively

4.40 and 15, respectively

Q. 15 If and the numbers of observations , the value of standard deviation is

1.9

2.10

3.11

4.12

Q. 16 Given below are two statements.

Statement I: Leslie՚s matrix population model is a discrete and age-independent model

Statement II: The first row in Leslie՚s projection matrix represents fertility

In light of the above statements, choose the most appropriate answer from the options given below

1. Both Statement I and Statement II are correct

2. Both Statement I and Statement II are incorrect

3. Statement I is correct but Statement II is incorrect

4. Statement I is incorrect but Statement II is correct

Q. 17 Which one of the categories of development projects does NOT require an Environmental Impact Assessment (EIA) report?

1. Category ‘A’ projects

2. Category projects

3. Category projects

4. Category and projects