2021 Prelims Paper 1 UPSC Question Paper

2021 Prelims Paper 1 UPSC Questions

31.

How is permaculture farming different from conventional chemical farming?
1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are pre-dominant.
2. Conventional chemical farming can cause an increase in soil salinity but the occurrence of such a phenomenon is not observed in permaculture farming.
3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions.
4. The practice of mulching is very important in permaculture farming but not necessarily so in conventional chemical farming.
Select the correct answer using the code given below.

A.

1 and 3

B.

1, 2 and 4

C.

4 only

D.

2 and 3

ANSWER :

B. 1, 2 and 4

32.

With reference to ‘palm oil’, consider the following statements:
1. The palm oil tree is native to Southeast Asia.
2. The palm oil is a raw material for some industries producing lipstick and perfumes.
3. The palm oil can be used to produce biodiesel.
Which of the statements given above are correct?

A.

1 and 2 only

B.

2 and 3 only

C.

1 and 3 only

D.

1, 2 and 3

ANSWER :

B. 2 and 3 only

33.
With reference to the Indus river system, of the following four rivers, three of them pour into one of them which joins the Indus direct. Among the following, which one is such river that joins the Indus direct?
A.
Chenab
B.
Jhelum
C.
Ravi
D.
Sutlej
ANSWER :
D. Sutlej
34.
With reference to India, Didwana, Kuchaman, Sargol and Khatu are the names of
A.
glaciers
B.
mangrove areas
C.
Ramsar sites
D.
saline lakes
ANSWER :
D. saline lakes
35.

Consider the following rivers:
1. Brahmani
2. nagavali
3. Subarnarekha
4. Vamsadhara
Which of the above rises from the Eastern Ghats?

A.

1 and 2

B.

2 and 4

C.

3 and 4

D.

1 and 3

ANSWER :

B. 2 and 4

36.

Consider the following statements:
1. The Global Ocean Commission grants licenses for seabed exploration and mining in international waters.
2. India has received licenses for seabed mineral exploration in international waters.
3. ‘Rare earth minerals’ are present on the seafloor in international waters.
Which of the statements given above are correct?

A.

1 and 2 only

B.

2 and 3 only

C.

1 and 3 only

D.

1, 2 and 3

ANSWER :

B. 2 and 3 only

37.
Among the following, which one is the least water-efficient crop?
A.
Sugarcane
B.
Sunflower
C.
Pearl millet
D.
Red gram
ANSWER :
A. Sugarcane
38.

Consider the following statements:
1. In the tropical zone, the western sections of the oceans are warmer than the eastern sections owing to the influence of trade winds.
2. In the temperate zone, westerlies make the eastern sections of oceans warmer than the western sections.
Which of the statements given above is/are correct?

A.

1 only

B.

2 only

C.

Both 1 and 2

D.

Neither 1 nor 2

ANSWER :

C. Both 1 and 2

39.

39. In the context of India’s preparation for Climate-Smart Agriculture, consider the following statements:
1. The ‘Climate-Smart Village’ approach in India is part of a project led by the Climate Change, Agriculture and Food Security (CCAFS), an international research programme.
2. The project of CCAFS is carried out under the Consultative Group on International Agricultural Research (CGIAR) headquartered in France.
3. The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) in India is one of the CGIAR’s research centres.
Which of the statements given above are correct?

A.

1 and 2 only

B.

2 and 3 only

C.

1 and 3 only

D.

1, 2 and 3

ANSWER :

D. 1, 2 and 3

40.
β€œLeaf litter decomposes faster than in any other biome and as a result the soil surface is often almost bare. Apart from trees, the vegetation is largely composed of plant forms that reach up into the canopy vicariously, by climbing the trees or growing as epiphytes, rooted on the upper branches of trees”. This is the most likely description of
A.
coniferous forest
B.
dry deciduous forest
C.
mangrove forest
D.
tropical rain forest
ANSWER :
D. tropical rain forest