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

What is the molarity of the solution that contains 20 grams of NaOH in 500 ml of solution [Na = 23, O = 16, H = 1]

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

Question # 6

Use of glycol as anti freeze in the automobile is an important application of

Question # 7

Compared to a 1.0M aqueous solution of calcium chloride will have

Question # 8

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

Question # 9

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

Question # 10

The substance which contains the water of crystallization is called

Question # 11

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

Question # 12

Which one of the following is a colligative property?

Question # 13

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 # 14

Which statement is incorrect for and ideal solution

Question # 15

A Solution containing 6.8 g of non-ionic solute in 100g of water was found to freeze at -0.93°C. If krfor water is 1.86 and molecular mars of solute is

Question # 16

A solution of two component is called

Question # 17

The movement of solvent molecules through a semipermeable membrane is called

Question # 18

The weight of pure NaOH required to prepare 250 cm3of 0.1 N solution is

Question # 19

Dust particles in smoke is a solution of the type

Question # 20

If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is

Question # 21

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

Question # 22

Osmotic pressure of a solution increases by

Question # 23

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

Question # 24

Solution which distill without change in composition or temperature are called

Question # 25

What will be the molarity of solution if 103 g (NH4)2SO4is dissolved per 600 cm3of water

Question # 26

Isotonic solutions have same

Question # 27

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

Question # 28

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

Question # 29

A one thousand dm3sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe3f(eq) in parts per million

Question # 30

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

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ECAT Chemistry Chapter 9 Important MCQ's

Sr.# Question Answer
1 The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called
A. Solvation
B. Hydration
C. Hydrogenation
D. None
2 A one thousand dm3sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe3f(eq) in parts per million
A. 0.001
B. 0.01
C. 0.1
D. 1.0
3 18 g glucose is dissolved in 90 g of water. The relative lowering vapor pressure is equal to :
A. 1/5
B. 5.1
C. 1/51
D. 6
4 Equal volumes of 0.1 M AgNO3and 0.2 M NaCl are mixed. The concentration of NO-3 ions in the mixture will be
A. 0.1 M
B. 0.05 M
C. 0.2 M
D. 0.15 M
5 Osmotic pressure of a solution increases by
A. Decreasing the temperature
B. Increasing the volume
C. Increasing the number of molecules of the solute
D. None of the above
6 In which type of following solutions we don't know the total volume of the solutions :
A. Percentage weight/weight
B. Percentage weight/volume
C. Percentage volume/volume
D. Percentage volume/weight
7 The example of colligative property is
A. Boiling point
B. Osmosis
C. Freezing point
D. Osmotic pressure
8 50 cm3of 0.05 molar nrea (N2H4CO) solution has % W/N concentration
A. 6%
B. 3%
C. 0.3 %
D. 0.6 %
9 Which one of the following has continuous solubility curve
A. NH4NO3
B. CaCI
C. CaCI2. 6H2O
D. Na2SO4. 10H2O
10 Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point
A. Methanol + CCI4
B. Methanol + acetone
C. Ether + HCI
D. Acetone + chloroform

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