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Unit of surface tension is...

Unit of surface tension is

A

`Nm^2`

B

`Nm^-2`

C

`Nm^-1`

D

`Nm`

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The correct Answer is:
D
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Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohension along the liquid molecules. It is scalar quantity and is numberically equal to the surface energy. Numerically, it is proved that the potential soluble salts and surfce active substance. Sparingly soluble salts and surface acitve substances decrease the surface tension of the liquid. However, the fairly soluble solutes increase the surface tension of the liquid. Surface tension of a liquid is independent of surface area but it depends on the intemolecular forces and the temperature. Which among the following is not the unit of surface tension ?

AAKASH INSTITUTE-TEST 3-EXERCISE
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  3. Which among the following is an intensive property?

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  5. A chemical reaction takes place in a vessel of cross-sectional area 15...

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  6. Five moles of an ideal gas undergoes reversible expansion from 1 L to ...

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  7. Enthalpy of which of the following reactions does not represent the st...

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  8. One mole of an ideal gas undergoes change of state from (4 L, 3 atm) t...

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  9. The difference between heat of reaction at constant pressure and at co...

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  10. According to kinetic theory of gases, the inconrect statement is

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  11. The most probable speed of an ideal gas at constant pressure varies wi...

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  12. At high pressure, the compressibility factor for one mole of van der W...

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  13. The suitable thermodynamic conditions for a spontaneous reaction at al...

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  14. A closed cylinder contains 40 g of SO3 and 4 g of helium gas at 375 K....

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  15. For given mass of an ideal gas at constant temperature

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  16. Which among the following will boil at highest temperature?

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  17. If 200 ml of 0.1 MH2SO4 salution is mixed with 200 ml of 0.15 M NaOH s...

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  18. Unit of surface tension Is

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  19. For which of the following processes, entropy change is negative?

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