ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 60

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12th ICSE

IMPORTANT

Earn 100

Which of the following statements about the composition of the vapour over an ideal $1 : 1$ molar mixture of benzene and toluene is correct? Assume that the temperature is constant at $25 ° C$ . (Given, vapour pressure data at $25 ° C$ , benzene $= 12.8 kPa,$ toluene $= 3.85 kPa$ )

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Important Questions on Solutions

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 61

At

100 ° C

the vapour pressure of a solution of

6.5 g

of a solute in

100 g

water is

732 mm

. If

k_{b} = 0.52

, the boiling point of this solution will be

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 62

If molality of the dilute solution is doubled, the value of molal depression constant

(k_{f})

will be

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IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 63

Which of the following is dependent on temperature?

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 64

The freezing point of benzene decreases by

0.45 ° C

when

0.2 g

of acetic acid is added to

20 g

of benzene. If acetic acid associated to form a dimer in benzene, percentage association of acetic acid in benzene will be (

k_{f}

for benzene

= 5.12 K kg {mol}^{- 1}

)

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 65

For

1

molal aqueous solution of the following compounds, which one will show the highest freezing point?

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IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 66

The recommended concentration of fluoride ion in drinking water is up to

1 ppm

as fluoride ion is required to make teeth enamel harder converting

[3 {Ca}_{3} {({PO}_{4})}_{2} . Ca {(OH)}_{2}]

to

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IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>TRUE OR FALSE TYPE QUESTIONS>Q 22

Osmosis is a spontaneous process.

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12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>TRUE OR FALSE TYPE QUESTIONS>Q 31

When the molecular state of a solute remains unchanged in the solution,

i = 1

.