Question # 1

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

To calculate volume of the solvent, we need to know, the :

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Density of solute

Normality of solute

Mass of solute

Molarity of solute

(A) is one molar NaCl solution and (b) is 1 molal NaCl solutin :

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A and B are of same strength.

A is more Concentrate than B.

b is more Concentrate than A.

None of above.

Solution may have units

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Molarity

Molality

Mole fraction

All of them

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

Which one of the following has discontinuous solubility curve

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CaCI₂6H₂O

NaCI

KCI

NaNO₃

Which substances are mixed to form a buffer solution?

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A strong acid and its salt of a strong base

Strong acid and its salt of weak base

Weak acid and its salt of strong base

Weak acid and its salt of weak base

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

Which of the following aqueous solutions have the lowest freezing point

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5.85% NaCI

6% urea

34.2 sucrose

All of them have same freezing points

Which one of the following solution will have higher vapour pressure than that of water

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Aqueous solution of methanol

Aqueous solution of HCI

Aqueous solution of glucose

Aqueous solution of urea

A homogeneous mixture of two or more than two chemical substances is called

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Solute

Solution

Solvent

Salvation

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

Every sample of matter with uniform properties and a fixed composition is called a :

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Solid

Liquid.

Phase.

Gas.

The molarity of solution containing 14.5 grams urea (N₂H₄CO) dissolved in 100 cm³of the solution is

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1 molar

0.1 molar

0.2 molar

0.25 molar

A solution containing 5.8 grams acetone (CH₃OCH₃), 4.6 gram ethyl alcohol (C₂H₅OH) and 12 grams chloroform (CHl₃) has mole fraction and mole percent of acetone

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0.11, 10%

0.33, 33%

0.22, 22%

0.11, 33%

A solution can be

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Dilute and concentrated

Saturated and dilute

Saturated and unsaturated

Supersaturated and saturated

Vant Hoff's factor of Ca(NO₃)₂is

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1

2

3

4

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point

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Methanol + CCI₄

Methanol + acetone

Ether + HCI

Acetone + chloroform

Which statement is not true. A solution is a homogeneous mixture of

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Two ionic substance like NaCl and HCl

Two molecular substances sugar and water

A solute and a solvent 1% NaHCO₃in water

NaCl and sand

Elevation of boiling point is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

None of these above

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

Mixture of alcohol and water can be separated by

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Solvent extraction techniques

Crystallization

Precipitation and filtration

Fractional distillation

Cane sugar is not soluble in benzene but soluble in water because

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Cane sugar is a macro molecule

Cane sugar is an ionic compound

Can sugar has hydrogen bonding

Can sugar is an organic molecule

Equal volumes of 0.1 M AgNO₃and 0.2 M NaCl are mixed. The concentration of NO^-₃ions in the mixture will be

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0.1 M

0.05 M

0.2 M

0.15 M

Which of the following solutions has the highest boiling point ?

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5.85% solution of sodium chloride.

18.0% solution of glucose.

6.0% solution of urea.

All have same boiling points.

A solution of glucose is of methanol in water has vapor pressure :

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Equal that of water.

Equal to that of methanol.

More than that of water.

Less than that f water.

The boiling point of an a zeotropic mixture of water and ethye alcohol is less than that of water and alcohol. The mixture shows

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That solution is highly saturated

No deviation from Raoult's law

Positive deviation from Raoult's law

Negative deviation from Raoult's law

Molarity of pure water is :

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33.3

55.5

44.4

66.6

A solution sucrose is 34.2%. The volume of solution containing one mole of solute :

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342cm³

1000cm³

500cm³

242cm³

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

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