Solubility of gas decreases with
For Gases, solubility decreases as temperature increases. The physical reason for this is that when most gases dissolve in solution, the process is exothermic. This means that heat is released as the gas dissolves.
Solubility of which gas is maximum in water?
NH3 forms hydrogen Bonding with water.
Molality is preferred over molarity in handling solutions in chemistry laboratory because
Molarity is number of moles per unit volume of the solution and molality is number of moles per unit mass of solvent. Volume is temperature dependent where as mass is constant at all temperatures. So, molality remains constant but molarity changes with temperature. Hence , molality is preferred over molarity.
Aquatic animals are more comfortable in cold water rather that warm water because
The amount of dissolved oxygen in water decreases with rise in the water's temperature. Cold water has more dissolved oxygen per unit area than warm water. This the reason why aquatic animals are more comfortable in cold water than warm water.
The molal depression constant depends upon
Molal depression constant : It is defined as the depression in freezing point when the molality of the solution is unity, i.e., one mole of the solute is dissolved in 1000 gram or 1 kilogram of the solvent.
In the depression of freezing point experiment, it is found that
Addition of non volatile solute decreases the vapour pressure.
If the temperature of an aqueous solution increases, it will cause
As temperature increases volume also increases and so Molarity decrease.
Solution is defined as
Solution is Homogeneous mixture of Solute and Solvent.
Amalgam of mercury with sodium is an example of
Solute is mercury( liquid) and solvent is sodium.
Which among the following is miscible in each other?
Methanol and Water both are Polar. There is intermolecular Hydrogen Bonding interaction.
Which among the following is an example of liquid in solid?
Hydrated salts have water molecule of hydration as solute.
Which among the following is an example of a solid solution in which the solute is a gas?
Pumice stone is example of gas in Solid.
The type of intermolecular interaction present in n-Hexane and n-Octane is
Both are Non Polar.
Mathematical expression relating molarity and molality is
m = moles of solute / mass of solvent. M = moles of solute / volume of solution.
The tanks used by divers are filled with air diluted with
Size of Helium is small so does not causes “Bents” to divers when the dive back to surface.
Ethylene glycol is added to water as antifreeze. It will
Adding ethylene glycol to water reduces the freezing point of water. Water freezes at temperatures much less than 0 degree Celsius when ethylene glycol is added to it. It is used as an anti-freeze
Which of the following solutions of H2SO4 is more concentrated?
An aqueous solution of methanol and water has vapour pressure
They show positive deviation.
Which has highest freezing point at 1 atm?
Sugar solution has i=1 so ΔTf minimum so Tf will be maximum.
A solution showing a large positive deviation from ideal behaviour has
A solution showing a large positive deviation from ideal behaviour shows lower boiling point than both the components.
Solution of hydrogen in palladium is an example of
Hydrogen (solute , gas ) and solvent is palladium (solid).
In which unit, the concentration of solution remains independent of temperature
It is independent of volume hence independent of Temperature.
6.3 g oxalic acid is used to make 250 mL aqueous solution .The volume of 0.1N NaOH solution required to neutralize completely 10 mL of this solution is
v2 = 40 ml
The depression in freezing point for 1M urea, 1 M glucose and 1 M NaCl are in the ratio of
NaCl has i = 2 while urea and glucose will have i = 1
25ml of a solution of barium hydroxide titration with 0.1molar solution of hydro-chloric acid gave a titre value of 35ml.The molarity of barium hydroxide is
Ba(OH)2 + 2HCI → BaCl2 + 2H2O
M1V1X1 → M2V2X2