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
A.A-4, B-2, C-1, D-3
B.A-4, B-1, C-2, D-3
C.A-3, B-1, C-2, D-4
D.A-3, B-2, C-1, D-4✓ Correct
Explanation
Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O (matches with 3). Baking soda is sodium hydrogen carbonate (sodium bicarbonate), NaHCO₃ (matches with 2). Bleaching powder is calcium oxychloride, CaOCl₂ (matches with 1). Gypsum is calcium sulfate dihydrate, CaSO₄·2H₂O (matches with 4). Therefore, the correct matching is A-3, B-2, C-1, D-4.
💡 Practice unlimited NDA PYQs + AI-tracked progress on each topic. Sign up free →
Want more NDA practice?
Free daily 10-Q quiz · adaptive mocks · 4,000+ verified PYQs · AI doubt solver in Hindi + English