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Questions >> CBSE XII >> Chemistry >> Solutions

Based on solute-solvent interactions, arrange the following in order of increasing solubility in n-octane and explain. Cyclohexane, KCl, $CH_3OH, CH_3CN$.

asked Aug 5, 2014 by sreemathi.v

1 answer

Suggest the most important type of intermolecular attractive interaction in the following pair : acetonitrile ($CH_3CN$) and acetone ($C_3H_6O$).

asked Aug 5, 2014 by sreemathi.v

1 answer

Suggest the most important type of intermolecular attractive interaction in the following pair : methanol and acetone

asked Aug 5, 2014 by sreemathi.v

1 answer

Suggest the most important type of intermolecular attractive interaction in the following pair : $NaClO_4$ and water

asked Aug 5, 2014 by sreemathi.v

1 answer

Suggest the most important type of intermolecular attractive interaction in the following pair : $I_2$ and $CCl_4$

asked Aug 5, 2014 by sreemathi.v

1 answer

Suggest the most important type of intermolecular attractive interaction in the following pair : n-hexane and n-octane

asked Aug 5, 2014 by sreemathi.v

1 answer

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

asked Aug 5, 2014 by sreemathi.v

1 answer

Two elements A and B form compounds having formula $AB_2$ and $AB_4$. When dissolved in 20 g of benzene ($C_6H_6$), 1 g of $AB_2$ lowers the freezing point by 2.3 K whereas 1.0 g of $AB_4$ lowers it by 1.3 K. The molar depression constant for benzene is 5.1 K $kg mol^{–1}$. Calculate atomic masses of A and B.

asked Aug 5, 2014 by sreemathi.v

1 answer

A 5% solution (by mass) of cane sugar in water has freezing point of 271K. Calculate the freezing point of 5% glucose in water if freezing point of pure water is 273.15 K

asked Aug 5, 2014 by sreemathi.v

1 answer

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate: vapour pressure of water at 298 K.

asked Aug 5, 2014 by sreemathi.v

1 answer

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate: molar mass of the solute

asked Aug 5, 2014 by sreemathi.v

1 answer

Calculate the mass of a non-volatile solute (molar mass 40 g $mol^{–1}$) which should be dissolved in 114 g octane to reduce its vapour pressure to 80%.

asked Aug 5, 2014 by sreemathi.v

1 answer

The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.

asked Aug 5, 2014 by sreemathi.v

1 answer

Heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will be the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane?

asked Aug 5, 2014 by sreemathi.v

1 answer

An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?

asked Aug 5, 2014 by sreemathi.v

1 answer

What is meant by positive and negative deviations from Raoult's law and how is the sign of $\Delta_{mix}H$ related to positive and negative deviations from Raoult's law?

asked Aug 5, 2014 by sreemathi.v

1 answer

The partial pressure of ethane over a solution containing $6.56 × 10^{–3}$ g of ethane is 1 bar. If the solution contains $5.00 ×\times 10^{–2}$ g of ethane, then what shall be the partial pressure of the gas?

asked Aug 4, 2014 by sreemathi.v

1 answer

State Henry’s law and mention some important applications?

asked Aug 4, 2014 by sreemathi.v

1 answer

Why do gases always tend to be less soluble in liquids as the temperature is raised?

asked Aug 4, 2014 by sreemathi.v

1 answer

What role does the molecular interaction play in a solution of alcohol and water?

asked Aug 4, 2014 by sreemathi.v

1 answer

A sample of drinking water was found to be severely contaminated with chloroform $(CHCl_3$) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass): determine the molality of chloroform in the water sample.

asked Aug 4, 2014 by sreemathi.v

1 answer

A sample of drinking water was found to be severely contaminated with chloroform $(CHCl_3$) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass): express this in percent by mass

asked Aug 4, 2014 by sreemathi.v

1 answer

An antifreeze solution is prepared from 222.6 g of ethylene glycol $(C_2H_6O_2$) and 200 g of water. Calculate the molality of the solution. If the density of the solution is $1.072 g mL^{–1}$, then what shall be the molarity of the solution?

asked Aug 4, 2014 by sreemathi.v

1 answer

A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.

asked Aug 4, 2014 by sreemathi.v

1 answer

How many mL of 0.1 M HCl are required to react completely with 1 g mixture of $Na_2CO_3$ and $NaHCO_3$ containing equimolar amounts of both?

asked Aug 4, 2014 by sreemathi.v

1 answer

A solution of glucose in water is labelled as 10% w/w, what would be the molality and mole fraction of each component in the solution? If the density of solution is $1.2 g mL^{–1}$, then what shall be the molarity of the solution?

asked Aug 4, 2014 by sreemathi.v

1 answer

Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is $1.504 g mL^{–1}$?

asked Aug 4, 2014 by sreemathi.v

1 answer

Define the following term : Mass percentage

asked Aug 4, 2014 by sreemathi.v

1 answer

Define the following term : Molarity

asked Aug 4, 2014 by sreemathi.v

1 answer

Define the following term : Molality

asked Aug 4, 2014 by sreemathi.v

1 answer

Define the following term : Mole fraction

asked Aug 4, 2014 by sreemathi.v

1 answer

Give an example of a solid solution in which the solute is a gas.

asked Aug 4, 2014 by sreemathi.v

1 answer

Define the term solution. How many types of solutions are formed? Write briefly about each type with an example.

asked Aug 4, 2014 by sreemathi.v

1 answer

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