1. The surface tension of a liquid is $(10^{8} dyne / cm)$. It is equivalent to
(1) $(10^4 N / m)$
(2) $(10^{5} N / m)$
(3) $(10^{7} N / m)$
(4) $(10^{6} N / m)$
2. Soldering of two metals is possible because of the property of
(1) Viscosity
(2) Surface tension
(3) Osmosis
(4) Cohesion