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

Code:

This question was previously asked in
NDA-I (GAT) Official Paper (Held On: 13 Apr, 2025)
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  1. (a) - (4) , (b) - (2) , (c) - (1) , (d) - (3) 
  2. (a) - (4) , (b) - (1) , (c) - (2) , (d) - (3) 
  3. (a) - (3) , (b) - (1) , (c) - (2) , (d) - (4) 
  4. (a) - (3) , (b) - (2) , (c) - (1) , (d) - (4) 

Answer (Detailed Solution Below)

Option 4 : (a) - (3) , (b) - (2) , (c) - (1) , (d) - (4) 
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NDA 01/2025: English Subject Test
5.7 K Users
30 Questions 120 Marks 30 Mins

Detailed Solution

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CONCEPT:

Chemical Names and Their Formulas

  • Chemicals are often referred to by their common names, but they also have specific chemical formulas that represent their composition.
  • Matching chemical names with their correct formulas is essential for understanding their properties and applications.
  • Below are common examples:
    • Washing soda: Na₂CO₃·10H₂O (Sodium carbonate decahydrate)
    • Baking soda: NaHCO₃ (Sodium bicarbonate)
    • Bleaching powder: CaOCl₂ (Calcium oxychloride)
    • Gypsum: CaSO₄·2H₂O (Calcium sulfate dihydrate)

Therefore, the correct answer (a) - (3) , (b) - (2) , (c) - (1) , (d) - (4) 

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