Recent questions in Chemistry

The compressibility of gas is less than unity at S.T.P .Therefore

asked Feb 13, 2014 by sharmaaparna1

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A gas will approach ideal behaviour at :

asked Feb 13, 2014 by sharmaaparna1

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On mixing ,heptane and octane form an ideal solution.At 373K,the vapour pressures of the two liquid components (heptane and octane) are 105kPa and 45kPa respectively.Vapour pressure of the solution obtained by mixing 25g of heptane and 35g of octane will be (molar mass of heptane=100g $mol^{-1}$ and octane=114g$mol^{-1}$)

asked Feb 13, 2014 by sreemathi.v

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According to Graham's law , at a given temperature , the ratio of rates of diffusion $\large\frac{r_A}{r_B}$ of gases A and B is given by:

asked Feb 13, 2014 by sharmaaparna1

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If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, what is the change in freezing point of water$(\Delta T_f)$,when 0.02mol of sodium sulphate is dissolved in 1kg of water,is $(K_f=1.86Kkgmol^{-1})$?

asked Feb 13, 2014 by sreemathi.v

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The Compressibility factor for an ideal gas is

asked Feb 13, 2014 by sharmaaparna1

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A binary liquid solution is prepared by mixing n-heptane and ethanol.Which one of the following statements is correct regarding the behaviour of the solution?

asked Feb 13, 2014 by sreemathi.v

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X mL of $H_2$ gas effuses through a hole in a container is 5 Second. The time taken for the effusion of the same Volume of the gas Specified below under identical conditions is

asked Feb 13, 2014 by sharmaaparna1

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If 200 mL of 0.1 M urea solution is mixed with 300 mL of 0.2 M Glucose solutions at 300 K calculate osmotic pressure.

asked Feb 13, 2014 by sreemathi.v

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Which of the following solutions will freeze at the lowest temperature?

asked Feb 13, 2014 by sreemathi.v

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Which of the following solution boils at the highest temperature?

asked Feb 13, 2014 by sreemathi.v

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Which of the following aqueous solutions posses zero as Van't Hoff coefficient?

asked Feb 13, 2014 by sreemathi.v

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The Van't Hoff factor of $BaCl_2$ is

asked Feb 13, 2014 by sreemathi.v

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Which one of the following solutions will have the lowest freezing point?

asked Feb 13, 2014 by sreemathi.v

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When a substance is dissolved in a solvent,the vapour pressure of the solvent is decreased.This result in

asked Feb 13, 2014 by sreemathi.v

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The osmotic pressures of equimolar solutions of glucose, potassium chloride and Barium chloride will be in the order

asked Feb 13, 2014 by sreemathi.v

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Which of the following is the correct expression for van't Hoff factor?

asked Feb 13, 2014 by sreemathi.v

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When a solute is dissolved in a solvent,the elevation of boiling point of solution is

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Which one of the following aqueous solution will exhibit abnormal osmotic pressure?

asked Feb 13, 2014 by sreemathi.v

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A 2% solution of non electrolyte X is isotonic with 1% of urea(mol.wt.60),the molecular weight of X is

asked Feb 13, 2014 by sreemathi.v

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A 0.3%(w/v) solution of urea (mol.wt.60) would be isotonic with

asked Feb 13, 2014 by sreemathi.v

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Which one of the following pair of solutions are expected to be isotonic at the same temperature?

asked Feb 13, 2014 by sreemathi.v

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Calculate osmotic pressure of a solutions having $0.1\; M\;NaCl$ and $0.2\; M\; Na_2SO_4$ and $0.5 M\; HA$. (Given: Weak acid is 20% dissociated at $300^{\circ}K$)

asked Feb 13, 2014 by sreemathi.v

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Osmotic pressure of a dilute solution is

asked Feb 13, 2014 by sreemathi.v

1 answer