1916: When a man circles round the earth in a satellite, then:
(a) His mass becomes zero but weight remains constant
(b) Mass remains constant but weight becomes zero
(c) Both mass and weight remain constant
(d) Both mass and weight remain zero
1917: Total internal reflection occurs when light travels from:
(a) A rarer medium to a denser medium
(b) A denser medium to a rarer medium
(c) A rarer medium to a denser medium and the angle of incidence is less than the critical angle
(d) A rarer medium to a denser medium and the angle of incidence is greater than the critical angle
1918: Why does the Government of India promote the use of 'Neem-coated Urea' in agriculture?
(a) Release of Neem oil in the soil increases nitrogen fixation by the soil microorganisms
(b) Neem coating slows down the rate of dissolution of urea in the soil
(c) Nitrous oxide, which is a greenhouse gas, is not at all released into atmosphere by crop fields
(d) It is a combination of a weedicide and a fertilizer for particular crops
1919: India is a member of which among the following?
1. Asia-Pacific Economic Cooperation
2. Association of South-East Asian Nations
3. East Asia Summit
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) India is a member of none of them
1920: Match List I with List II and select the correct answer using the codes given below the lists :
List I List II
I. Fruit (A) Ovule
II. Seed (B) Leaf
III. Wood (C) Stem
IV. Starch (D) Ovary
Codes:
(a) I-B, II-A, III-C, IV-D
(b) I-D, II-A, III-C, IV-B
(c) I-B, II-C, III-A, IV-D
(d) I-D, II-C, III-A, IV-B