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| Q.1 | Ammonia is NOT used in domestic refrigeration and comfort air-conditioning because: | |
| Ans | 1. it is not soluble in water | |
| 2. its heat transfer coefficient is very low | ||
| 3. lubricating oil is not soluble in ammonia at all | ||
| 4. it is toxic and flammable |
Correct Ans Provided: 4
