Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 44

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Which will show the maximum depression in the freezing point when the concentration is $0.1 m$ ?

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Important Questions on Solutions

EASY

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 45

The freezing point of

0.05

molal solution of a non-electrolyte in water is______.

(K_{f} = 1 .86 K kg {mol}^{- 1})

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 46

A solution containing

6.8 g

of a non-ionic solute in

100 g

water was found to freeze at

272.07 K

. The freezing point depression constant of water is

{1.86 K kg mol}^{-1}

. The molar mass of the solute is _______.

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 47

6 g

of substance

X

dissolved in

100 g

of water lowers the freezing point by

0.93 K

. The molar mass of

X

is______.
(

K_{f} = 1 .86 K kg {mol}^{- 1}

)

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 48

The amount of urea to be dissolved in

500 g

of water to produce a depression of

0.186 K

in the freezing point is______.
(

K_{f} for water =1.86 K kg {mol}^{- 1}

) (Molecular mass =

60 g {mol}^{- 1}

)

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 49

How much polystyrene of molar mass

9000 g {mol}^{- 1}

would have to be dissolved in

100 g of C_{6} H_{6}

to lower its freezing point by

1.05 K

?

(K_{f} of C_{6} H_{6} = 4.9 K kg {mol}^{- 1})

.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 50

The molal freezing point constant for water is

1 .86 º C kg {mol}^{- 1}

. If

342 g

of cane sugar (

C_{12} H_{22} O_{11})

is dissolved in

1000 g

of water, the solution will freeze at______.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 51

1.0 g

of a non-electrolyte solute dissolved in

50 g

of benzene lowered the freezing point of benzene by

0.40 K . K_{f}

for benzene is

{5.12 K kg mol}^{-1}

. The molecular mass of the solute will be______.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 52

0.44 g

of a substance dissolved in

22.2 g

of benzene lowered the freezing point of benzene by

0 . 567^{0} C

. The molecular mass of the substance is____.

(K_{f} = 5 .12 º C kg {mol}^{- 1})