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Addition of soaps or detergents to water decreases the surface tension of water-why?

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CHHAYA PUBLICATION-STATES OF MATTER : GASES AND LIQUIDS-WARM UP EXERCISE
  1. The critical temperature and the critical pressure of a gas are T(c) a...

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  2. The critical temperature of H(2),NH(3) and CO(2) gases are 5K, 405 K a...

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  3. The critical temperature of NH(3) and SO(2) gases are 405.0 K and 430....

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  4. The critical temperature of NH(3),CO(2) and O(2) gases are 405.6K, 304...

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  5. The values of van der waals constants 'a' and 'b' for X, Y, and Z gase...

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  6. Why is the density of a liquid greater than that of a gas ?

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  7. The intermolecular attractions is dimethyl ether are weaker than that ...

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  8. Why does the vapour pressure of a liquid increase with the increase in...

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  9. Why does the boiling point of a liquid incrase with the increase in th...

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  10. At 20^(@)C, the surface tension of water is thre times that of C Cl(4)...

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  11. Water wets the surface of a glass, but mercury does not. Why?

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  12. At t(1)""^(@)C and t(2)""^(@)C, the values of viscosity coefficients o...

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  13. Why is the nib of a fountain pen splitted?

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  14. Why does water rise inside a capillary tube?

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  15. At 20^(@)C the increasing order of viscosity of acetic acid, acetone a...

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  16. Why is the upper meniscus of mercury convex in a glass tube?

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  17. Compare the CGS and SI units of viscosity?

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  18. Addition of soaps or detergents to water decreases the surface tension...

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  19. Why does the surface enegy increase on dispersion of a large water dro...

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  20. Why does oil spread over water when it is poured over water?

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