ECAT Pre Engineering Chemistry Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 9 Solutions

Try The MCQ's Test For ECAT Chemistry Chapter 9 Solutions

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ECAT Chemistry Chapter 9 Solutions

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Question # 1

10g Of NaOH Has Been Dissolved Perdm3of solution. The morality of solution is :

Question # 2

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

Question # 3

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

Question # 4

An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature

Question # 5

Precipitation will occur until the ionic product becomes

Question # 6

The substance which contains the water of crystallization is called

Question # 7

Hydrolysis of potassium acetate produces

Question # 8

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

Question # 9

The osmotic pressure of 1 m solution at 27°C is

Question # 10

The term ebullioscopy is used for

Question # 11

In azeotropic mixture showing negative deviation form Raoult's law show

Question # 12

Two solutions of NaCl and KCl are prepared separately by dissolving 0.1 M of the solute in water. Which of the following statements is not true for these solution

Question # 13

Saturated solution of NaCl on heating becomes

Question # 14

The substance which is present in large quantity is called a :

Question # 15

According to Raoult's law

Question # 16

The sum of mole percent of all the components of solution is always equal to :

Question # 17

At room temperature, the mole fraction of a solution in 0.25 and the vapour pressure of the solvent is 0.80 atm. Then the lowering of vapour pressure is

Question # 18

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

Question # 19

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

Question # 20

Which if the following has the highest freezing point at one atmosphere

Question # 21

The osmotic pressure of a dilute solution is directly proportional to the

Question # 22

Number of moles of solute dissolved in 1 Kg of solvent is knowns as

Question # 23

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

Question # 24

Molarity of pure water is :

Question # 25

The freezing mixture used in ice cream machine consists of ice and

Question # 26

Saturated solution of a solid is prepared at a constant temperature. 100 cm3of this saturated solution is evaporated in a china dish. The mass of the residue is called

Question # 27

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

Question # 28

The ionic strength of a solution containing 0.1 mole/kg of KCl and 0.2 mole/kg of CuSO4is

Question # 29

The solutions of NaCl and KCl are prepared separately by dissolving same amount of solute in water, which of the following statements is true fro these solutions ?

Question # 30

Which of the following aqueous solutions have the lowest freezing point

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ECAT Chemistry Chapter 9 Important MCQ's

Sr.# Question Answer
1 Solubility cure of Na2SO410H2shows
A. Constant increase of solubility
B. Constant decreases of solubility
C. Discontinuously solubility wit temperature
D. None of above
2 The term cryoscopy is used for
A. Depression of freezing point
B. Elevation in boiling poing
C. Lowering of vapour pressure
D. Osmotic pressure
3 What will be the molarity of solution if 103 g (NH4)2SO4is dissolved per 600 cm3of water
A. 2.32 M
B. 3.32 M
C. 4.32 M
D. 1.30 M
4 Cane sugar is not soluble in benzene but soluble in water because
A. Cane sugar is a macro molecule
B. Cane sugar is an ionic compound
C. Can sugar has hydrogen bonding
D. Can sugar is an organic molecule
5 Saturated solution of NaCl on heating becomes
A. Super saturated
B. Unsaturated
C. Remains saturated
D. None
6 The sum of mole percent of all the components of solution is always equal to :
A. Less than 100
B. One
C. 100
D. 10
7 Which is not a colligative property?
A. Osmotic pressure
B. Lowering of vapour pressure
C. Depression of freezing point
D. Elevation of boiling point
8 The sum of mole fractions (X) of components of solution is equal to
A. 100
B. 200
C. One
D. Zero
9 A solution contains 1.2046 x 1024hydrochloric acid molecules in one dm3of the solution. The strength of the solution is
A. 6 N
B. 2 N
C. 4 N
D. 8 N
10 An azeotropic mixture showing it's positive deviation from Raoult's law, the volume of the mixture is :
A. Slightly more than the total volume of the components.
B. Slightly less than the total volume of the components.
C. Equal to the total volume of the components.
D. None of these.

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