Surface tension of water is 73 dyne ${\rm{c}}{{\rm{m}}^{ - 1}}$ at $20\,^\circ C$. If surface area is increased by 0.10 ${{\rm{m}}^2}$ work done is

NEET UG CHEMISTRY MCQ: STATES OF MATTER

1 Hard

1 of 1

Application +4 | -1

Surface tension of water is 73 dyne

\mathrm{c}{\mathrm{m}^{ - 1}}

20\,^\circ C

. If surface area is increased by 0.10

{\mathrm{m}^2}

work done is

View answer and explanation

Correct option: B

7.3 \times {10^4}\mathrm{erg}

Option B (

7.3 \times {10^4}\mathrm{erg}

) is correct because work done is the product of surface tension and the change in surface area.

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\begin{array}{cccccccccccccccccccc} {\underline {{\text{Gas}}} }&{\underline {\,{\text{Critical}}\,\,{\text{temperature}}} } \\ {\text{A}}&{{T_{{C_1}}}} \\ {\text{B}}&{{T_{{C_2}}}} \\ {\text{C}}&{{T_{{C_3}}}} \\ {\text{D}}&{{T_{{C_4}}}} \end{array}

{T_{{C_1}}} > {T_{{C_2}}} > {T_{{C_3}}} > {T_{{C_4}}}

{r^x}

r

x