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19. Osmotic pressure of a urea solution at

10 ° C  is 500 mm. Osmotic pressure of the solution become 105.3 mm. when it is dilute and temperauter raised to 25°  C . the extent of dilution is

a. 6 times

b. 5 time

c. 7 time

d. 4 time

Ans. b

(9)

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