With the rise of temperature,the surface tension of a liquid

The property utilized in the manufacture of lead shots is

The work done in increasing the size of a soap film from $10 \, cm \times 6 \, cm$ to $10 \, cm \times 11 \, cm$ is $3 \times 10^{-4} \, J$. The surface tension of the film is:

$A$ square wire frame of each side $L$ is dipped in soap solution. On taking out, a membrane is formed. If the surface tension of the solution is $T$, the force acting on the frame will be (in $T L$)

Why do colours and lubricating oil have less surface tension?

If a section of a soap bubble (of radius $R$) through its center is considered, then the force on one half due to surface tension is