Match List-I with List-II and select the correct answer by using the codes given below the list :
List-I (Chemical Substance) : List-II (Application)
(a) Bleaching Powder (i) Preparation of glass
(b) Baking Soda (ii) For making toys
(c) Washing Soda (iii) Decolourisation
(d) Plaster of Paris (iv) Antacid
Codes :

Question

Accepted Answer

Option 1 is the correct answer for matching List-I with List-II. Let's provide a detailed explanation for why this is the case:

1. **Bleaching Powder (a) - Decolourisation (iii):**
   - Bleaching powder, chemically known as calcium hypochlorite, is widely used for decolourisation and bleaching purposes. It is commonly used in the textile industry to bleach fabrics and in the paper industry to whiten paper. Its primary function is to remove color, which aligns perfectly with the application of decolourisation.

2. **Baking Soda (b) - Antacid (iv):**
   - Baking soda, or sodium bicarbonate, is well-known for its use as an antacid. It neutralizes stomach acid and provides relief from indigestion and heartburn. This application is consistent with its role as an antacid, making the match with option (iv) appropriate.

3. **Washing Soda (c) - Preparation of glass (i):**
   - Washing soda, or sodium carbonate, is used in the glass manufacturing process. It acts as a flux for silica, lowering the melting point of the mixture and aiding in the formation of glass. This makes its application in the preparation of glass accurate.

4. **Plaster of Paris (d) - For making toys (ii):**
   - Plaster of Paris, which is calcium sulfate hemihydrate, is commonly used for making molds and casts, including toys. It is easy to shape and hardens quickly, making it suitable for creating detailed and durable toy models.

Now, let's explain why the other options are incorrect:

- **Option 2:** This option incorrectly matches Bleaching Powder with making toys, Baking Soda with glass preparation, Washing Soda with antacid, and Plaster of Paris with decolourisation. These applications do not align with the chemical properties and common uses of these substances.
  
- **Option 3:** This option incorrectly matches Baking Soda with making toys, Washing Soda with antacid, and Plaster of Paris with glass preparation. These mismatches do not reflect the typical applications of these chemicals.

- **Option 4:** This option incorrectly matches Bleaching Powder with making toys, Baking Soda with glass preparation, Washing Soda with antacid, and Plaster of Paris with decolourisation. These do not correspond to the usual uses of these substances.

In conclusion, Option 1 correctly matches each chemical substance with its appropriate application based on their chemical properties and common uses, making it the correct answer.