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Q81 (NDA-I/2025) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Match List I with List II and select the answer using the code given below the Lists : List I (Chemical Name) A. Washing soda B. Baking soda C. Bleaching powder D. Gypsum List II (Chemical Formula) 1. CaOCl2 2. NaHCO3 3. Na2CO3-10H2O 4. CaSO4-2H2O Code :

Result
Your answer: —  Â·  Correct: D
Explanation

The matching of chemical names to their formulas is as follows: Washing soda is sodium carbonate decahydrate, represented by the formula Na2CO310H2O. Baking soda is sodium bicarbonate, which has the chemical formula NaHCO3. Bleaching powder, also known as calcium hypochlorite or chloride of lime, is represented by the formula CaOCl2. Gypsum is a mineral composed of calcium sulfate dihydrate, with the formula CaSO42H2O. Therefore, the correct mapping is A-3 (Washing soda), B-2 (Baking soda), C-1 (Bleaching powder), and D-4 (Gypsum). This corresponds to the sequence 3, 2, 1, 4 in the provided options. These compounds are essential in everyday chemistry, ranging from cleaning agents and food ingredients to construction materials.

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