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The molal elevation constant is the rati...

The molal elevation constant is the ratio of the elevation in boliing point to

A

Molarity

B

Molality

C

Mole fraction of solute

D

Mole fraction of solvent.

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The correct Answer is:
B
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What is molal elevation constant ?

What is elevation of boiling point ?

The molal elevation constant of water is 0.51. The boiling point of 0.1 molal aqueous NaCl solution is nearly:

How is molar mass related to the elevation in boiling point of a solution ?

When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Molal elevation (K_(b))

Y g of a non-volative Oranic substance of molecular mass M is dissolved in 250g benzene Molal elevation contant of bezene is K_(b) . Elevation in its B.P is given by

When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is : Lowering in vapour pressure in an experiment was found to be x mm of Hg. It is

When some amount of non-volatile solute is dissolved in a solvent to prepare a dilute solution, the vapour pressure of the solvent is lowered and it is directly proportional to the mole fraction of solvent in the solution . Relative lowering in vapour pressure is equal to mole fraction of solute . Elevation in boiling point of solvent is a collgative property like lowering in vaour pressure of solvent in solution , K_(b) i.e., molal elevation constant is calculated by the formula, K_(b)=DeltaT_(b)// molality and also by the expression, K_(b)=RT_(b)^(2)//1000l_(v) where T_(b) is boiling point of solvent and I_(v) is latent heat of vapourisation for 1 gm solvent . Abnormal elevation is boiling point =iX elevation in boiling point in ideal solution where i=van't Hoff factor Relative lowering in vapour pressure :

From a point E on the horizontal due to east of a tree, the top of the tree makes an angle of elevation 60^(@) .From a point S on the horizsontal due west of the tree the same top makes an angle of elevation 30^(@) . The angle of elevation made by the top of the tree at the mid point of ES is

AAKASH SERIES-SOLUTIONS -Objective Exercise -1
  1. In the depression of freezing point experiment, it is found that (a...

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  2. During the depression in freezing point experiment, an equilibrium is ...

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  3. The molal elevation constant is the ratio of the elevation in boliing ...

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  4. The relationship between osmotic pressure at 273 K when 10 g glucose (...

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  5. Equimolar solutions of electrolytes with different number of ion in th...

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  6. If alpha is the degree of dissociation of Na2SO4, the Vant Hoff factor...

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  7. Solution A contains 7g/L MgCl2 and solution B contains 7g/L of NaCl. A...

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  8. Which of the following aqueous solutions containing 10g of solute in e...

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  9. Which of the following salt will have same value of Van't Hoff's facto...

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  10. After removing the hard shell of an egg by dissolving in dil. HCl, a s...

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  11. In a pressure cooker the cooking is fast because

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  12. The van't Hoff factor for BaCl2 at 0.01 M concentration is 1.98. The p...

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  13. For a weak monobasic acid, if pKa = 4, then at a concentration of 0.01...

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  14. The molal freezing point constant of water is 1.86C/M. Therefore the f...

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  15. A 5% solution of cane suger is isotonic with 0.5% of X. The molecular ...

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  16. An aqueous solution freezes at - 0.186^@C (Kf = 1.860, Kb = 0.512^@). ...

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  17. The properties of solutions which depend only on the number of particl...

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  18. The solublity of I2 in KI solution is more than its solubility in pure...

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  19. If 0.1M solution of glucose and 0.1M solution of urea are placed on tw...

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  20. The freezing point of equimolal aqueous solution will be highest for

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