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P. Bahadur Test: Solutions


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P. Bahadur Test: Solutions - Question 1

Solubility of gas decreases with

Detailed Solution for P. Bahadur Test: Solutions - Question 1

For Gasessolubility 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.

P. Bahadur Test: Solutions - Question 2

Solubility of which gas is maximum in water?

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NHforms hydrogen Bonding with water.

P. Bahadur Test: Solutions - Question 3

Molality is preferred over molarity in handling solutions in chemistry laboratory because

Detailed Solution for P. Bahadur Test: Solutions - Question 3

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.

P. Bahadur Test: Solutions - Question 4

Aquatic animals are more comfortable in cold water rather that warm water because

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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.

P. Bahadur Test: Solutions - Question 5

The molal depression constant depends upon

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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.

P. Bahadur Test: Solutions - Question 6

In the depression of freezing point experiment, it is found that

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Addition of non volatile solute decreases the vapour pressure.

P. Bahadur Test: Solutions - Question 7

If the temperature of an aqueous solution increases, it will cause

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As temperature increases volume also increases and so Molarity decrease.

P. Bahadur Test: Solutions - Question 8

Solution is defined as

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Solution is Homogeneous mixture of Solute and Solvent.

P. Bahadur Test: Solutions - Question 9

Amalgam of mercury with sodium is an example of

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Solute is mercury( liquid) and solvent is sodium.

P. Bahadur Test: Solutions - Question 10

Which among the following is miscible in each other?

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Methanol and Water both are Polar. There is intermolecular Hydrogen Bonding interaction.

P. Bahadur Test: Solutions - Question 11

Which among the following is an example of liquid in solid?

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Hydrated salts have water molecule of hydration as solute.

P. Bahadur Test: Solutions - Question 12

Which among the following is an example of a solid solution in which the solute is a gas?

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Pumice stone is example of gas in Solid.

P. Bahadur Test: Solutions - Question 13

The type of intermolecular interaction present in n-Hexane and n-Octane is

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Both are Non Polar.

P. Bahadur Test: Solutions - Question 14

Mathematical expression relating molarity and molality is

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m = moles of solute / mass of solvent. M = moles of solute / volume of solution.

P. Bahadur Test: Solutions - Question 15

The tanks used by divers are filled with air diluted with

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Size of Helium is small so does not causes “Bents” to divers when the dive back to surface.

P. Bahadur Test: Solutions - Question 16

Ethylene glycol is added to water as antifreeze. It will

Detailed Solution for P. Bahadur Test: Solutions - Question 16

Adding ethylene glycol to water reduces the freezing point of waterWater freezes at temperatures much less than 0 degree Celsius when ethylene glycol is added to it. It is used as an anti-freeze

P. Bahadur Test: Solutions - Question 17

Which of the following solutions of H2SO4 is more concentrated?

Detailed Solution for P. Bahadur Test: Solutions - Question 17

The correct answer is option A
1 M H2SO4 solution is more concentrated than 1 N acid solution. Actually 1M solution of acid is prepared by dissolving 98 g of the acid (1 gram mole) per litre of the solution while 1 N solution of acid is prepared by dissolving 49 g of the acid (1 gram equivalent) in the same volume of the solution.

P. Bahadur Test: Solutions - Question 18

An aqueous solution of methanol and water has vapour pressure

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They show positive deviation.

P. Bahadur Test: Solutions - Question 19

Which has highest freezing point at 1 atm?  

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Sugar solution has i=1 so ΔTf minimum so Tf will be maximum.

P. Bahadur Test: Solutions - Question 20

A solution showing a large positive deviation from ideal behaviour has 

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A solution showing a large positive deviation from ideal behaviour shows lower boiling point than both the components.

P. Bahadur Test: Solutions - Question 21

Solution of hydrogen in palladium is an example of

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Hydrogen (solute , gas ) and solvent is palladium (solid).

P. Bahadur Test: Solutions - Question 22

In which unit, the concentration of solution remains independent of temperature

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It is independent of volume hence independent of Temperature.

P. Bahadur Test: Solutions - Question 23

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

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v= 40 ml

P. Bahadur Test: Solutions - Question 24

The depression in freezing point for 1M urea, 1 M glucose and 1 M NaCl are in the ratio of

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NaCl has i = 2 while urea and glucose will have i = 1

P. Bahadur Test: Solutions - Question 25

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

Detailed Solution for P. Bahadur Test: Solutions - Question 25

Ba(OH)2 + 2HCI → BaCl2 + 2H2O

M1V1X1 →  M2V2X2 

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