Q. With reference to applications of reverse osmosis (RO), consider the following statements:

1. It is used in seawater desalination.
2. It is used in household drinking water filters.
3. It is used in the carbonation of soft drinks.

Select the correct option using the codes given below:
Answer: Only 1 & 2
Notes: Reverse osmosis is a membrane-based technique used for removing dissolved salts and impurities, commonly applied in seawater desalination and household water filters. Carbonation of soft drinks involves dissolving carbon dioxide under pressure, which does not utilize reverse osmosis. Thus, only statements 1 and 2 are correct.