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