(C) 25. The maximum force in addition to the weight required to pull a wire frame 5.0 cm long from a water surface at a temperature of 20 °C is 720 dyne. The surface tension of water is A) 72.0 dyne/cm (B) 145 dyne/cm (C) 720 dyne/cm (D) 14.5 dynelcm
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Option: A
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