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(a) Mr. Raju has determined the molecular masses of different solutes in different solvents by osmotic pressure measurements and presented them in the following table. Please help him to complete the table.
| Solute | Solvent | Theoretical Molecular Mass | Experimental Molecular Mass |
| NaCl | Water | A | A/2 |
| Benzoic | Benzene | B | — |
| Acid | Water | C | — |
| Urea | Benzene | D | — |
| Acetic acid | Water | E | — |
| CaCl2 | Water | F | — |
| Glucose | Water | G | — |
| Ai2(So4)3 | — |
(b) The extent of deviation from ideal behaviour of a solution is explained by van’t Hoff factor, i. What is meant by van’t Hoff factor?