UPSC Prelims 2000 · General Studies
Question 113: Science and Technology
Match List I (Industrial processes) with List II (Industry with which associated) and select the correct answer using the codes given below the Lists: List I I. Cracking II. Smelting III. Hydrogenation IV. Vulcanization List II A) Rubber B) Petroleum C) Copper D) Edible fats Codes:
AnswerThe answer is (b).
Cracking breaks large hydrocarbon molecules into smaller ones in petroleum refining. Smelting extracts a metal, such as copper, from its ore by heating. Hydrogenation turns liquid oils into solid fats, such as vanaspati, for edible use. Vulcanization treats rubber with sulphur to make it stronger and elastic. Learn each process with its industry.
- I. Cracking: petroleum (B).
- II. Smelting: copper (C).
- III. Hydrogenation: edible fats (D).
- IV. Vulcanization: rubber (A).
Why each option is right or wrong
- (a) Gets all four wrong, starting with cracking at copper and smelting at petroleum.
- (b) Right: cracking-petroleum, smelting-copper, hydrogenation-edible fats, vulcanization-rubber.
- (c) Puts hydrogenation with rubber and vulcanization with edible fats, both wrong.
- (d) Puts cracking with copper and smelting with petroleum, both wrong.
Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2000, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.