1) The work done against surface tension information of a drop of mercury of radius 4 cm is
1) $9.34 \times 10^{-3} J$
2) $10 \times 10^{-2} J$
3) $4 \times 10^{-3} J$
4) 466 J
2) The work done by a boy in making a soap bubble of diameter 1.4 cm by blowing, if the surface tension of soap solution is $0.03 N / m$ is
1) $3 \times 10^{-5} J$
2) $3.696 \times 10^{-5} J$
3) $2 \times 10^{-5} J$
4) $4.2 \times 10^{-5} J$