Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 79

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On dissolving $18 g$ of a solid in $100 g H_{2} O$ at $20 ° C,$ water vapour pressure decreases from $17.53 mm$ to $17.22 mm .$ The molecular weight of solid is_______

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Important Questions on Solutions

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 80

The vapour pressure of acetone at

20 ° C

is

185 torr .

When

1.2 g

of a non-volatile substance was dissolved in

100 g

of acetone at

20 ° C,

its vapour pressure was

183 torr .

The molar mass of the substance in

g {mol}^{-1}

is________.

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 81

18 g

glucose (

C_{6} H_{12} O_{6}

) is added to

178.2 g

water. The vapour pressure of water (in

torr

) for this aqueous solution is _____ at

373 K

.

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 82

The CORRECT relation between elevation of boiling point and molar mass of solute is______

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 83

The elevation in boiling point of a solution of

13.44 g

of

{CuCl}_{2}

in

1 kg

of water will be________.(Molecular mass of

{CuCl}_{2} =134.4

and

K_{b} =0.52 {Km}^{-1}

)

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 84

For the given electrolyte

A_{x} B_{y}

, the degree of dissociation '

α

' can be given as

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 85

The vapour pressure of water depends upon the

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 86

Among the following substances, the lowest vapour pressure is exerted by -

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Chemistry Crash Course COMEDK UGET>Chapter 15 - Solutions>Exercise 1>Q 88

The vapour pressure of a pure liquid solvent

A

is

0.80 atm

. When a non-volatile substance

B

is added to the solvent, its vapour pressure drops to

0.60 atm

. Mole fraction of the component

B

in the solution is: