10. The temperature at which the surface tension of water is zero
(a) 0°C
(b) 277 K
(c) 370°C
(d) Slightly less than 647 K
Ans. c,d
(16)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (126)