UPSC Prelims 1998·GS1·science-and-technology·science and technology

Match List I with List II and select the correct answer using the codes given below the lists: List I List II I. Blue vitriol A) Sodium bicarbonate II. Epsom salt B) Sodium hydroxide III. Baking soda C) Magnesium sulphate IV. Caustic soda D) Copper sulphate Codes:

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Last updated 23 May 2026, 3:31 pm IST
  1. AI-C, II-D, III-B, IV-A
  2. BI-D, II-C, III-C, IV-A
  3. CI-C, II-D, III-A, IV-B
  4. DI-D, II-C, III-A, IV-BCorrect

Explanation

The correct answer is D because it correctly matches the common chemical names with their scientific counterparts as follows: 1. Blue vitriol is Copper sulphate. It is a salt used as a fungicide and is known for its bright blue color. 2. Epsom salt is Magnesium sulphate. It is commonly used in baths to soothe muscles and as a saline laxative. 3. Baking soda is Sodium bicarbonate. It is a chemical leavening agent used extensively in cooking and cleaning. 4. Caustic soda is Sodium hydroxide. It is a strong base used in manufacturing soaps, paper, and various industrial processes. Matching these pairs leads to the sequence I-D, II-C, III-A, and IV-B.
science-and-technology: Match List I with List II and select the correct answer using the codes given below the lists: List I List II I. Blue vi

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