2871: Consider the following :
1. Rice fields
2.Coal mining
3. Domestic animals
4.Coal mining Wetlands
Which of the above are sources of methane, a major greenhouse gas?
(a) 1 and 4 only
(b) 1, 2 and 3 only
(c) 2 and 3 only
(d) 1, 2, 3 and 4
2872: Match List I with List II and select the correct answer using the codes given below the Lists :
List I------------- List II
(Bhakti Saint)---- (Profession)
I. Namdev------- (A) Barber
II. Kabir--------- (B) Weaver
III. Ravidas-------(C) Tailor
IV. Sena--------- (D) Cobbler
Codes:
(a) I-B, II-C, III-A, IV-D
(b) I-C, II-B, III-D, IV-A
(c) I-C, II-B, III-A, IV-D
(d) I-B, II-C, III-D, IV-A
2873: 6 equiddistant vertical lines are drawn on a board. 6 equidistant horizontal line are also drawn on the board cutting the 6 vertical lines, and the distance between any two consecutive horizontal lines is equal to that between any two consecutive vertical lines. What is maximum number of squares thus formed ?
(A) 56
(B) 44
(C) 37
(D) 55
2874: The phenomenon of mirage is due to:
(a) Increased absorption of light by air at higher temperature
(b) Change in the refractive index of air with the change in temperature
(c) Total internal reflection
(d) Decreased absorption of light by air at higher temperature
2875: Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low-calorie sweetening agent in food items. What is the basis of this use ?
(a) Aspartame is several times sweeter than table "sugar, hence food items made with small quantities of aspartame yield fewer calorieson oxidation
(b) When aspartame is used in food processing, the sweet taste remains, but it 'beccmes resistant to oxida- tion
(c) Aspartame is as sweet as sugar, but after ingestion into the body, it is converted into metabolites that yield no calories
(d) Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in human body due to lack of requisite enzymes