10000 Questions for Prelims 2020 | Prelims 2020 Marathon

upsc2020said

With reference to Biofertilisers, consider the

following statements:

1. These are biologically active substances that

are applied in soil to enrich the soil with nitrogen, phosphorous, organic matter.

2. Nostoc and Anabaena are free living photosynthetic organisms capable of fixing atmospheric nitrogen.

3. Mycorrhizal fungi acts as bio-fertliser and are

known to occur naturally on the roots of forest

trees and crop plants.

Which of the statement(s) given above is/are correct?

a) 1 only

b) 1 and 2 only

c) 2 and 3 only

d) 1, 2 and 3

upsc2020said

With reference to sprinkler irrigation, consider the following statements:

1. Sprinklers are best suited to sandy soils.

2. It is the best technique for watering fruit plants.

Which of the statements above is / are correct?

a. 1 only

b. 2 only

c.  1 and 2 Both

d. Neither 1 nor 2

upsc2020said

With reference to composite fish culture, consider the following statements:

1. Fast growing compatible species of fish of similar feeding habits are stocked together.

2. The composite fish culture system is a technology developed by the Indian Council of Agricultural Research.

Which of the statements above is / are correct?

a. 1 only

b. 2 only

c.  1 and 2 Both

d. Neither 1 nor 2

vikhcu2073said

Which of the following does not form a component of Standard Model in Physics:

A) Neutrinos

B) Electrons

C) Gravitational Force

4) Electromagnetic Force