ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 29

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A $500 g$ toothpaste sample has $0.2 g$ fluoride concentration. What is the concentration of fluorine in terms of ppm level?

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Important Questions on Solutions

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 30

Which is not affected by temperature?

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 31

The molecular weight of sodium chloride is determined by measuring the osmotic pressure of its aqueous solution is

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 32

Consider the following figure and choose the correct option:

Question Image

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 33

{PtCl}_{4} . 6 H_{2} O

can exist as a hydrated complex. One molal aqueous solution of the salt recorded a depression in freezing point of

3.72 ° C

. If the salt is assumed to be

100 %

ionised in solution and

K_{f}

for

H_{2} O

is

1.86 K kg {mol}^{- 1}

, the molecular formula of the complex is likely to be

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 34

Freezing point of water is

0 ° C

. At what temperature will one molal solution of

NaCl

freeze, if

NaCl

is taken to be completely dissociated (molal depression constant of water

= 18.6

)?

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 35

For an aqueous solution, freezing point is

- 1.86 ° C

. Elevation of the boiling point of same solution (

k_{f} = 1.86 ° {mol}^{- 1} kg

and

k_{b} = 0.512 ° {mol}^{- 1} kg

) is

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 36

In a mixture of A and B, components show negative deviation when

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ICSE Chemistry>Chapter 2 - Solutions>OBJECTIVE (MULTIPLE CHOICE) TYPE QUESTONS>Q 37

In a

0.2

molal aqueous solution of a weak acid HX, the degree of ionization is

0.3

. Taking

k_{f}

for water is as

1.85

, the freezing point of the solution will be nearest to