Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 85

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Earn 100

How many grams of $KCl$ should be added to $1000 g$ of water, so that the freezing point reduces to $- 10 ° C$ ?
( $K_{f} =1.86 º C kg {mol}^{- 1}$ ).

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Important Questions on Solutions

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 86

Identify the compound amongst the following of which

0.1 M

aqueous solution has highest boiling point.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 87

The boiling point of water

(100 ° C)

becomes

100.52 ° C,

if

3 g

of a non-volatile solute is dissolved in

200 mL

of water. The molecular weight of solute is________. (

K_{b}

for water is

0.6 K kg {mol}^{-1}

)

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 88

The freezing point of equimolal aqueous solution will be the highest for______.

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 89

A

0.2 molal

aqueous solution of a weak acid

(HX)

is

20 %

ionised. The freezing point of this solution is______.
(Given

K_{f} = 1.86 ° C / m

for water)

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 90

If

M, W

and

V

represent molar mass of solute, mass of solute and volume of solution in litres, respectively, which among following equations is TRUE?

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 91

The osmotic pressure of solution containing

34.2 g

of cane sugar (molar mass =

{342 g mol}^{-1}

) in

1 L

of solution at

20 ° C

is______ (Given:

{R=0.082 L atm K}^{-1} {mol}^{-1}

)

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 92

30 {\times10}^{- 4} kg

of urea dissolved in water to make

500 mL

aqueous solution and this solution is isotonic with cane-sugar solution. How much mass of cane sugar in its one litre solution?

(H =1, N =14, O =16, C =12)

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Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 3>Q 1

The volume of ethyl alcohol (density

1.15 g / cc

) that has to be added to prepare

100 cc

of

0.5 M

ethyl alcohol solution in water is______.