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UPSC Prelims 1998

147 questions, in the order they were asked.

1998 · Q105Science & TechnologySpace Technology & Astronomymoderate

Consider the following statements regarding asteroids: I. Asteroids are rocky debris of varying sizes orbiting the Sun. II. Most of the asteroids are small but some have diameter as large as 1000 km. III. The orbit of asteroids lies between the orbits of Jupiter and Saturn. Of these statements:

  1. (a)I, II and III are correct
  2. (b)II and III are correct
  3. (c)I and II are correct
  4. (d)I and III are correct
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Official answer(c) I and II are correct

1998 · Q106Science & TechnologyMaterials & Engineeringmoderate

Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to I. Act as a reducing agent. II. Remove silica associated with the iron ore. III. Function as fuel, to supply heat. IV. Act as an oxidizing agent. Of these statements:

  1. (a)I and II are correct
  2. (b)II and IV are correct
  3. (c)I and III are correct
  4. (d)III and IV are correct
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Official answer(c) I and III are correct

1998 · Q115Science & TechnologySpace Technology & Astronomyeasy

Match List I with List II and select the correct answer by using the codes given below the lists: List I (Special Characteristic) I. Farthest planet from the Sun II. Largest planet of the solar system III. Planet second from the Sun in the solar system IV. Planet nearest to the Sun List II (Name of Planet) A) Mercury B) Venus C) Jupiter D) Pluto E) Saturn

  1. (a)I-B, II-C, III-E, IV-A
  2. (b)I-C, II-E, III-A, IV-B
  3. (c)I-D, II-A, III-B, IV-C
  4. (d)I-D, II-C, III-B, IV-A
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Official answer(d) I-D, II-C, III-B, IV-A

1998 · Q117Science & TechnologyScience & Technology Historymoderate

Match the names of outstanding Indian scientists given in List I with the area of their specialised work given in List II and select the correct answer using the codes given below the lists: List I I. Dr. Raja Ramanna II. Dr. M. S. Swaminathan III. Prof. U. R. Rao IV. Prof. Meghnad Saha List II A) Plant Chemistry B) Nuclear Physics C) Thermodynamics and astrophysics D) Space research E) Agricultural sciences

  1. (a)I-C, II-E, III-B, IV-A
  2. (b)I-B, II-A, III-D, IV-C
  3. (c)I-B, II-E, III-D, IV-C
  4. (d)I-C, II-A, III-D, IV-B
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Official answer(c) I-B, II-E, III-D, IV-C

1998 · Q119Science & TechnologyScience & Technology Historymoderate

Match List I with List II and select the correct answer using the codes given below the lists: List I I. Theory of Mutation II. Theory of Evolution III. One-gene-one-enzyme hypothesis IV. Operon concept List II A) Beadle and Tatum B) Jacob and Monod C) Darwin D) De Vries

  1. (a)I-C, II-D, III-A, IV-B
  2. (b)I-D, II-C, III-A, IV-B
  3. (c)I-D, II-C, III-B, IV-A
  4. (d)I-C, II-D, III-B, IV-A
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Official answer(b) I-D, II-C, III-A, IV-B