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A mercury drop of radius 10^–3 m is broken into 125 equal size droplets. Surface tension of mercury is 0.45 Nm^–1.

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A mercury drop of radius 10–3 m is broken into 125 equal size droplets. Surface tension of mercury is 0.45 Nm–1. The gain in surface energy is:

(1) 2.26 × 10–5 J

(2) 28 × 10–5 J

(3) 17.5 × 10–5 J

(4) 5 × 10–5 J

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Correct option is (1) 2.26 × 10–5 J

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