ECAT Pre Engineering Chemistry Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 9 Solutions

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ECAT Chemistry Chapter 9 Solutions

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Question # 1

A solutiion of 0.5 mole camphor in 100 grmas chloroform (Kb= 0.322) has rise in boiling point than that of chloroform by

Question # 2

17.1 grams sucrose (C12H22O11) dissolved in 250 cm3 of solution. This has molarity

Question # 3

Solubility of a substance in water decreases with rise in temperature except

Question # 4

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

Question # 5

The number of moles of solute in 1000g (1 Kg) of the solvent is called :

Question # 6

Molarity of pure water is :

Question # 7

Saturated solution of NaCl on heating becomes

Question # 8

The sum of mole fractions (X) of components of solution is equal to

Question # 9

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

Question # 10

An azeotropic mixture showing it's positive deviation from Raoult's law, the volume of the mixture is :

Question # 11

Freezing point depression is measured by

Question # 12

The depression of freezing point is directly proportional to

Question # 13

The amount of solute present in the given amount of solvent is called

Question # 14

Precipitation will occur until the ionic product becomes

Question # 15

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

Question # 16

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

Question # 17

When the solute is present in trace quantities the following expression is used

Question # 18

The process in which water molecules surround solute particles is called

Question # 19

The volume of 0.1 M H2SO4required to neutralize completely 40 ml of 0.2 M NaOH solution is

Question # 20

Osmotic pressure of a solution increases by

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

A solution can be

Question # 25

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

Question # 26

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

Question # 27

Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as

Question # 28

Number of moles of the solute dissolved per dm3of the solution is knows as

Question # 29

5g of glucose is dissolved fro 100 cm of solution. Percentage of solution is :

Question # 30

The process of osmosis was first discovered by

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ECAT Chemistry Chapter 9 Important MCQ's

Sr.# Question Answer
1 The substance which contains the water of crystallization is called
A. Hydrated
B. Solvated
C. Crystal
D. None
2 What is the molarity of H2SO4solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?
A. 4.18 M
B. 8.14 M
C. 18.4 M
D. 18 M
3 An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature
A. It is saturated
B. it shows positive deviation from Raoult's law
C. It shows negative deviation form Raoult's law
D. It is metastable
4 The example of colligative property is
A. Boiling point
B. Osmosis
C. Freezing point
D. Osmotic pressure
5 0.5 M of H2SO4is diluted from 1 litre to 10 litre, normality of resulting solution is
A. 1 N
B. 0.1 N
C. 10 N
D. 11 N
6 Which is independent of temperature
A. Molarity
B. Molality
C. Normality
D. Mole fraction
7 10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be
A. 1.0
B. 0.75
C. 0.5
D. 0.25
8 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
A. 10.23 moles dm-3
B. 11.55 moles dm-3
C. 11.73 moles dm-3
D. 12.67 moles dm-3
9 A solution can be
A. Dilute and concentrated
B. Saturated and dilute
C. Saturated and unsaturated
D. Supersaturated and saturated
10 The number of moles of solute in 1000g (1 Kg) of the solvent is called :
A. Molarity
B. Molarity
C. Normality
D. Mole fraction

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