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Question:

100 ml of liquid A was mixed with 25 ml of liquid B, to give a non-ideal solution of A-B. The volume of this mixture will be:

75 ml

fluctuating between 75 ml to 125 ml

125 ml exact

close to 125 ml but not exceed than 125 ml

Solution:

For non-ideal solution, ΔVmix < 0. Hence, total volume will be little less than (100 + 25 = 125 mL). Hence option D is correct.