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Questions >> CBSE XII >> Chemistry >> Solutions

What is the effect of temperature on the vapour pressure of a liquid .

asked Sep 10, 2015 by meena.p

1 answer

Sugar does not dissolve in benzene because of

asked Sep 10, 2015 by meena.p

1 answer

Formula of Normality is

asked Sep 10, 2015 by meena.p

1 answer

What is the formula of the Gream equivalent weight for acid

asked Sep 10, 2015 by meena.p

1 answer

What is the relation between Henry's law and Raoult's law. In both ,

asked Sep 9, 2015 by meena.p

1 answer

Vapour pressure depends on the

asked Sep 9, 2015 by meena.p

1 answer

Which one is the characteristic of an ideal solution

asked Sep 9, 2015 by meena.p

1 answer

Kf stands for

asked Sep 9, 2015 by meena.p

1 answer

Colligative properties of the solution depend upon

asked Sep 9, 2015 by meena.p

1 answer

The ratio of normal molecular mass to the abnormal molecular mass is called as

asked Sep 9, 2015 by meena.p

1 answer

Which is not a colligative prolixity ?

asked Sep 9, 2015 by meena.p

1 answer

Isotonic solutions have

asked Sep 9, 2015 by meena.p

1 answer

The solubility of a gas in a liquid is directly proportional to the pressure of the gas. this statement is refers to

asked Sep 9, 2015 by meena.p

1 answer

Osmotic pressure of the solution depends on :

asked Sep 9, 2015 by meena.p

1 answer

A morality of pure water is :

asked Sep 9, 2015 by meena.p

1 answer

The number of moles of solute per kg of a solution is called as

asked Sep 9, 2015 by meena.p

1 answer

A solution is defined as a

asked Sep 9, 2015 by meena.p

1 answer

how is vant hoff factor taken out for a compound by its formula, eg: K4Fe(Cn)6

asked Jul 11, 2015 by chitrangada.singh.9

1 answer

if 11 g of oxalic acid are dissolved in 500ml of solution (density=1.1g/ml) what is the mass% of oxalic acid in the solution?

asked Jun 15, 2015 by sivanya27

1 answer

what is the sum of the mole fractions of all the components in a three component system

asked Jun 5, 2015 by poovarasivijayakumar

1 answer

What mass of ethylene glycol is added to5.50 kg of water to lower the freezing point of water from 0OC to -10oC ?Kf=1.86

asked Jun 5, 2015 by _1

0 answers

What mass of ethylene glycol is added to5.50 kg of water to lower the freezing point of water from 0OC to -10oC ?Kf=1.86

asked Jun 5, 2015 by _1

0 answers

.The partial pressure of ethane over a saturated solution containing 6.56x10-3 g of ethane is 1 bar.If solution contain 5x10-2 g of ethane then what shall be the partial pressure of the gas?

asked Jun 5, 2015 by _1

0 answers

Calculate the mole fraction of ethylene glycol $(C_2H_6O_2)$ in a solution containing 20% of $C_2H_6O_2$ by mass.

asked Aug 8, 2014 by sreemathi.v

1 answer

At 300K,36g of glucose present per litre in its solution has an osmotic pressure of 4.98 bar.If osmotic pressure of solution is 1.52 bar at the same temperature,what would be its concentration?

asked Aug 8, 2014 by sreemathi.v

1 answer

What is the mole fraction of a solute,in 2.5m aqueous solution?

asked Aug 8, 2014 by sreemathi.v

1 answer

A 4% solution of sucrose is isotonic with 3% solution of an unknown organic substance.Calculate the molecular mass of unknown substance .

asked Aug 8, 2014 by sreemathi.v

1 answer

A 0.1539 molal aqueous solution of cane sugar (mol mass =$342gmol^{-1}$) has a freezing point of 271K while the freezing point of pure water is $273.15K$.What will be the freezing point of an aqueous solution containing 5g of glucose (mol mass =$180gmol^{-1}$) per 100g of solution.

asked Aug 8, 2014 by sreemathi.v

1 answer

The freezing point of a solution containing 0.2g of acetic acid is 20.0g of benzene is lowered by $0.45^{\large\circ}$C.Calculate Van't Hoff factor .[For benzene,$K_f=5.12Kkg mol^{-1}]$.What conclusion can you draw from the value of Van't Hoff factor obtained.

asked Aug 8, 2014 by sreemathi.v

1 answer

The freezing point of a solution containing 0.2g of acetic acid is 20.0g of benzene is lowered by $0.45^{\large\circ}$C. Calculate the molar mass of acetic acid from this data?[For benzene,$K_f=5.12Kkg mol^{-1}]$

asked Aug 8, 2014 by sreemathi.v

1 answer

0.5g KCl was dissolved in 100g water and the solution originally at $20^{\large\circ}C$,froze at $-0.24^{\large\circ}C$.Calculate the percentage ionization of salt.$(K_f$ per 1000g of water =1.86K)

asked Aug 8, 2014 by sreemathi.v

1 answer

What concentration of nitrogen should be present in a glass of water at room temperature.Assume a temperature of $25^{\large\circ}C$,a total pressure of atmosphere and mole fraction of nitrogen in air of 0.78.[$K_H$ for nitrogen =$8.42\times 10^{-7}$M/mm Hg]

asked Aug 8, 2014 by sreemathi.v

1 answer

100 mg of a protein is dissolved in enough water to make 10.0mL of a solution.If this solution has an osmotic pressure of 13.3 mm Hg at $25^{\large\circ}C$.What is the molar mass of protein.

asked Aug 8, 2014 by sreemathi.v

1 answer

Calculate the molarity and molality of a 15% solutions (by weight) of sulphuric acid density $1.020g cm^{-3}$.(Atomic masses H=10=16S=32 amu)

asked Aug 8, 2014 by sreemathi.v

1 answer

A solution containing,8g of a substance in 100g of diethyl ether boils at $36.86^{\large\circ}C$,whereas pure ether boils at $35.60^{\large\circ}C$.Determine the molecular mass of the solute.(For ether $K_b=2.02kg mol^{-1})$

asked Aug 8, 2014 by sreemathi.v

1 answer

A 6.90 M solution of KOH in water contains 30% by mass of KOH.Calculate the density of the KOH solution ?[Molar mass of KOH=$56g mol^{-1}$]

asked Aug 8, 2014 by sreemathi.v

1 answer

Urea forms an ideal solution in water .Determine the vapour pressure of aqueous solution containing 10% by mass of urea of $40^{\large\circ}C$.(Vapour pressure of water,at $40^{\large\circ}C$=55.3 mm Hg)

asked Aug 8, 2014 by sreemathi.v

1 answer

Calculate the freezing point of a solution containing 0.520g glucose $(C_6H_{12}O_6)$ dissolved in 80.20g of water.For water $K_f=1.86Kkg mol^{-1}$

asked Aug 8, 2014 by sreemathi.v

1 answer

A 0.2 percent aqueous solution of a non-volatile solute exerts vapour pressure of $1.004$ bar at $100^{\large\circ}$C.What is the molar mass of the solute?

asked Aug 8, 2014 by sreemathi.v

1 answer

Ethylene glycol (molar mass =$62g mol^{-1})$ is a common automobile antifreeze.Calculate the freezing point of a solution containing 12.4 of this substance in 100g of water would it be advisable to keep this substance in the car radiator during summer?

asked Aug 8, 2014 by sreemathi.v

1 answer

The freezing point of 0.02 mole fraction solution of acetic acid in benzene is 277.4K.Assuming molality equal to molarity,calculate $K_c$ for the equilibrium reaction $2CH_3COOH\;\;\leftrightharpoons\;\;(CH_3COOH)_2$.Given : $T_f$(benzene) =$278.4$ and $K_f$(benzene)=5.0K kg $mol^{-1}$.

asked Aug 8, 2014 by sreemathi.v

1 answer

100mg of a protein is dissolved in just enough water to make 10.0mL of solution.If this solution has an osmotic pressure of 13.3mm Hg at $25^{\large\circ}C$,what is the molar mass of the protein?(R=0.0821Latm $mol^{-1}K^{-1}$,760mm Hg =1atm)

asked Aug 8, 2014 by sreemathi.v

1 answer

Calculate the freezing point depression expected for 0.0711m aqueous solution of $Na_2SO_4$.If this solution actually freezes at $-320^{\large\circ}C$,what would be the value of van't Hoff factor? ($K_f$ for water is $1.86^{\large\circ}Cmol^{-1}$)

asked Aug 8, 2014 by sreemathi.v

1 answer

The boiling point elevation of 0.30g acetic acid in 100g benzene is 0.0633K.Calculate the molar mass of acetic acid from this data?What conclusion can you draw about the molecular state of the solute in the solution?[Given $K_b$ for benzene = $2.53\;K kgmol^{-1}]$

asked Aug 7, 2014 by sreemathi.v

1 answer

Calculate the temperature at which a solution containing 54g of glucose,$C_6H_{12}O_6$ in 250g of water will freeze ($K_f$ for water =$1.86K kg mol^{-1}$)

asked Aug 7, 2014 by sreemathi.v

1 answer

If boiling point of an aqueous solution is $100.1^{\large\circ}$C.What is its freezing point?Given,latent heat of fusion and vaporisation of water as 80 cal $g^{-1}$ and 540 cal $g^{-1}$ respectively.

asked Aug 7, 2014 by sreemathi.v

1 answer

The legal limit for human exposure to CO in the work place is 35ppm.Assuming that the density of air is $1.3g/L$,how many grams of CO are in 1.0L of air at the maximum allowable concentration?

asked Aug 7, 2014 by sreemathi.v

1 answer

A soda water bottle was opened and the soft drink is allowed to come at $27^{\large\circ}$C with the air containing carbon dioxide at $3.8\times 10^{-4}$atm.What would be the concentration of carbon dioxide in the soda water after it had stood open and come to equilibrium.Give value of Henry's constant for aqueous solution of carbon dioxide at $26^{\large\circ}$C is $3.1\times 10^{-2}$ mol lit $^{-1}$ atm$^{-1}$.

asked Aug 7, 2014 by sreemathi.v

1 answer

The Freezing point of ether was lowered by $0.60^{\large\circ}$C on dissolving 2.0gm of phenol in 100g of ether.Calculate the molar mass of phenol and comment on the result.Given $K_f$(ether)=$5.12Kkg mol^{-1}$

asked Aug 7, 2014 by sreemathi.v

1 answer

The molal elevation constant for water is $0.510Kmol^{-1}kg$.Calculate the boiling point of solution made by dissolving 6g urea in 200g water.

asked Aug 7, 2014 by sreemathi.v

1 answer

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