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| Q.19 | Lewis number is defined as: | |
| Ans | 1. the ratio of momentum diffusivity to mass diffusivity. | |
| 2. the ratio of thermal diffusivity to mass diffusivity. | ||
| 3. the ratio of momentum diffusivity to thermal diffusivity. | ||
| 4. the ratio of mass diffusivity to thermal diffusivity. |
Correct Ans Provided: 2
