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Define cryoscopic constant....

Define cryoscopic constant.

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The depression in freezing point when one mole of the solute is dissolved in 1000 g of the solvent is called molal depression constant or cryoscopic constant.
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Depression of freezing point of which of the following solutions does represent the cryoscopic constant of water ?

Assertion (A): Larger the value of cryoscopic constant of the solvent, lesser will be the freezing point of the solution. Reason (R ): Depression in the freezing point depends on the nature of the solvent.

The freezing point of cyclohexane is 6.5^(@)C . A solution of 0.65g of naphthalene in 19.2g of cyclohexane froze at 1.2^(@)C . What is the molecular mass of naphthalene? The cryoscopic constant for cyclohexane is 20.1 K "mol"^(-1) kg.

Write the units of cryoscopic constant and ebullioscopic constant?

The cryoscopic constant value depends upon:

The cryoscopic constant of water is 1.86 K "mol"^(-1) kg. An aqueous solution of cane sugar freezes at -0.372^(@)C . Calculate the molality of the solution.

A weak electrolyte XY is 5% dissociated in water. What is the freezing point of a 0.01 molal aqueous solution of XY ? The cryoscopic constant of water is 1.86 K/m.

What is the percent by mass of iodine needed to reduce the freezing point of benzene to 3.5^(@)"C" ? The freezing point and cryoscopic constant of pure benzene are 5.5^(@)"C" and 5.12K/m respectively.

0.1 molal solution of Hg(NO_(3))_(2) freezes at 0.558^(@) C. The cryoscopic constant for water is 1.86 KKg mol^(-1) then what will be the percentage ionisation of salt ?

(a) Define dielectric constant. (b) How does dielectric constant affect SN^1 rates ? (c) Explain why solvolyses are much faster in EtOH than in acetone even though both solvents have the same dielectric constants.

ICSE-SOLUTIONS-EXERCISE (PART-II Descriptive Questions) (VERY SHORT ANSWER QUESTIONS)
  1. What is an antifreeze?

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  2. Define molal elevation constant or ebullioscopic constant.

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  3. Define cryoscopic constant.

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  4. Why is osmotic pressure considered as colligative property?

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  5. What are isotonic solutions ?

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  6. Hypotonic and Hypertonic solution

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  7. Why NaCl solution freezes at lower temperature than water but boils a...

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  8. Why does molality of a solution remains unchanged with change in temp...

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  9. Why is the cooking temperature in pressure cooker higher than that in...

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  10. Solution A is obtained by dissolving 1 g of urea in 100 g of water an...

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  11. Which of the following solutions shows positive deviation from Raoult'...

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  12. When is the value of van't Hoff factor more than one?

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  13. Give one example each when van't Hoff factor is 2 and (1)/(2).

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  14. How is that the boiling points of the following solutions in water ar...

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  15. Mention a large scale use of the phenomenona of reverse osmosis.

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  16. What is the sum of mole fractions of all the components in a three-co...

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  17. State Raoult's law for a solution of volatile liquids.

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  18. Differentiate between molarity and molality of a solution .How can we ...

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  19. What will be the nature of the solution when ethyl alcohol and water ...

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  20. What happens when blood cells are placed in pure water?

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