Question # 1

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

Which of the following salts mixed with ice to make the freezing mixture used in ice cream machine

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KNO₃

NH₄NO₃

AgNO₃

Mg(NO₃)₂

Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm^-3. The molarity of HCl solution is

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10.23 moles dm^-3

11.55 moles dm^-3

11.73 moles dm^-3

12.67 moles dm^-3

The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is

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267

260

240

247

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

10g of NaOH has been dissolved per kg of solvent. The molality of solution is :

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.25 m

1.5 m

.5 m

2.5 m

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Solubility cure of Na₂SO₄10H₂shows

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Constant increase of solubility

Constant decreases of solubility

Discontinuously solubility wit temperature

None of above

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

Solution may have units

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Molarity

Molality

Mole fraction

All of them

Colligative properties are the properties of :

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Dilute solutions which behave as nearly ideal solutions.

Concentrated solutions which behave as nearly non-ideal solutions.

Both(i) and (ii)

Neither (i) nor (ii)

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called

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Solvation

Hydration

Hydrogenation

None

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

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ECAT Chemistry Chapter 9 Solutions Online Test MCQs With Answers

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