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Which one of the following pairs of solution can we expect to be isotonic at the same temperature ? (a) 0.1 M urea and 0.1 M NaCl (b) 0.1 M urea and 0.2 M MgCl2 (c) 0.1 M NaCl and 0.1 M Na2SO4 (d) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 |
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Answer» Correct option (d) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 Explanation: ‘i’ for Ca(NO3)2 and Na2SO4 is 3 each. Their colligative molarity are also the same. Hence, 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 solutions are isotonic. |
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