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ECAT Chemistry Forms of Matter Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry Forms of Matter MCQS Online Test

ECAT Chemistry Forms of Matter Chapter Online Test

Total Questions:	73
Time Allowed:	40 Minutes
Total Marks:	73
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Forms of Matter Test

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Page 1 of 3

Chemistry

1. A balloon occupies a volume of 2.0 L at 40°C. How much volume will it occupy at 30°C?

1.94 L

1.6 L

None of these

1.5 L

2. According to kinetic theory of gases there are

The velocity of molecules decreases for each collision.

Molecules which have considerable volume

No intermolecular forces of attraction

Intermolecular attractions

3. At constant volume temperature is increased then

Collision will not change

Collision will be in straight line

Collision on walls will be less

Collision frequency will be increases

4. According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels

Ina circular path

With an accelerated velocity

In a wavy path

In a straight line path

5. The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

Pressure, temperature, and volume of the gas

Temperature of the gas

Pressure of the gas

Volume of the gas

6. The non-ideal behavior results chiefly from

Intermolecular attraction only

Intermolecular attractions and finite volume

Elastic collisions and finite volume

Intermolecular attraction and infinite volume

7. Equal volume of all gases at same temperature and pressure contain number of molecules

None of these

Different

Multiples equal

No comparison

8. The spreading of fragrance or scent in air is due to

Low density

Effusion

Attraction with air

Diffusion

9. The total pressure exerted by a number of non reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

Dalton’s law

Boyle’s law

Charle’s law

Avogadro’s law

10. Volume of gas become four times if

Temperature becomes half at constant pressure

Temperature become one fourth at constant pressure

Temperature becomes two times at constant pressure

Temperature become four times at constant pressure

11. CuSO₄ is dissolved in water

Physical Property

Chemical Change

Chemical Property

Physical Change

12. A gas has non-ideal behavior at

Low temperature and high pressure

High temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

13. Equal volumes of gases at the same temperature and pressure contain equal number of particles. This statement is direct consequence of

Charles’ law

Ideal gas equation

Partial law of volumes

Perfect gas law

14. The light temperature at which a substance can exist as a liquid is called its

Normal temperature

Standard temperature

Critical temperature

Absolute temperature

15. Ideal gasses have all the following characteristics except.

The molecules occupy no space

Absence of intermolecular forces

All of the above are correct

Collisions among the molecules of an ideal gas are perfectly elastic

16. Which state of matter has the lowest density?

Solid

Gas

Liquid

Plasma

17. The diffusion of gases at absolute zero will be

Slightly increased

Zero

Unchanged

Slightly decreased

18. The volume of a gas that is occupied by its one mole at S.T.P is known as

Total volume

Atomic volume

Normal volume

Molar volume

19. For an ideal gas, number of moles per liter in terms of its pressure P, gas constant R and temperature T is

P/RT

PT/R

PRT

RT/P

20. The average kinetic energy of an ideal gas per molecule is SI units at 25°C will be

6.17 x 10¯²¹ J

7.16 x 10¯²⁰ J

6.17 x 10¯²¹ kJ

6.17 x 10¯²⁰ J

21. Which one is the correct value of R

0.082/dm³ atom K¯¹ mol¯¹

0.082/dm³ torr K¯¹ mol¯¹

0.082/dtm Cm³ K¯¹ mol¯¹

0.082/Cm³ torr K¯¹ mol¯¹

22. Under what conditions the gases deviate from the ideal behavior?

High temperature

High pressure

B and C

Low temperature

23. What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm³ volume?

97.1 atm

95.8 atm

96.7 atm

98.5 atm

24. Average kinetic energy of molecules is

Directly proportional to square root of temperature

Directly proportional to absolute temperature

Independent of absolute temperature

Inversely proportional to absolute temperature

25. The process of effusion and diffusion are best understood by

Charles’s law

Dalton’s law

Avogadro’s law

Graham’s law

Page 2 of 3

26. An ideal gas obeying kinetic gas equation can be liquefied if

It cannot be liquefied at any value of P and T

Its temperature is more than critical temperature

Its pressure is more than critical pressure

Its pressure is more than critical pressure but temperature is less than critical temperature.

27. Standard temperature and pressure of a gas refers to as

273 c and 760 mm Hg

273 k and 76 mm Hg

273 k and 760 mm Hg

273 c and 76 mm Hg

28. Who made volume and pressure correction to explain deviation of gases from ideal behavior?

Vander Waal

Boltzman

Chales

Clausius

29. The temperature of the gas is raised from 27°C to 927°C, the root mean square velocity is

Doubled

Halved

√927/27 times the earlier value

Same as before

30. One mole of a gas refers to

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 liters of a gas at S.T.P.

The number of molecules in one liter of gas

The number of molecules in one gram of gas

31. Which of the following are NOT examples of matter?

Copper (II) nitrate

Motion of a Car

Ice Cubes

Carbon Dioxide

32. The partial pressure exerted by the water vapors is called

Aqueous tension

Vapor pressure

Hydraulic pressure

Surface tension

33. The which of the following mixtures Dalton’s law of partial pressures is not applicable?

CH₄ and C₂H₆

HCl and NH₃

CO and CO₂

CO₂ and N₂

34. The correct value of the gas constant R is close to

0.082 liter-atm¯¹ K mol

0.082 liter-atm K

0.082 liter-atm K¯¹ mol¯¹

0.082 liter-atm¯¹ K mol¯¹

35. The respiration process taking place in animals depends upon a difference in

Partial pressure

Osmotic pressure

Atmospheric pressure

Vapour pressure

36. The specific heat of an ideal gas is

Proportional to T

Proportional to T³

Independent of T

Proportional to T²

37. Which of these gases diffuses more quickly than oxygen?

Cl₂

N₂O

H₂S

38. A gas occupies a balloon with a volume 2.0.1, at 33°C. How much volume will it occupy at 37°C, if pressure remains constant?

None of these

186,000 L

1.97 L

2.06 L

39. Which state of matter has lowest density?

Liquid

Gas

Plasma

Solid

40. Which of the following statements is false?

The mean kinetic energy of an ideal gas is independent of the pressure of the gas

The root mean square velocity of the gas can be calculated by the formula (3RT/M)

The relationship between average velocity (v) and root mean square velocity (u) is v = 0.9213 u

Avogadro number = 6.02 x 10²¹

41. A pressure of 1Nm¯² is equal to

Stalagmometer

One atmosphere

One Pascal

One bar

42. If 1/v is plotted on X-axis and pressure on y-axis at constant temperature, what should appear

Straight line

Hyperbola

Parabola

Curve

43. At constant temperature, volume of given mass of gas is inverse proportional to pressure on it. This statement is according to

Boyle’s law

Hook’s law

Charles’ law

Graham’s law

44. HCl being a strong acid is a _________. Wood sawed in two is __________.

Chemical property, Physical Change

Physical Change, Chemical Change

Physical property, Chemical Change

Chemical Change, Physical Change

45. Milk turns sour. This is a

Physical Change

Physical Property

Chemical Change

Chemical Property

46. Gas in a balloon occupies 3.3 L. What volume will it occupy if the pressure is changed from 100 kPa to 90 kPa (at constant temperature of 310 K (about room temperature),

None of these

2.97 L

3.6 L

29, 700 L

47. Which of the following option is incorrect about gases?

All molecules behave independently

PV/RT = n

All gases cannot be liquefied through Lind’s Method

All molecules move with same speed

48. The specific heat of a gas

Is proportional to the square root of its absolute temperature

Can have any value between 0 and infinity

Has two values Cp and Cv

Has only one value

49. A balloon occupies 3.2 L at 37°C. How much will it occupy at 42°C?

3.25 L

3.15L

None of these

312,480 L

50. The density of a gas at 27°C and 1 atm is d. Pressure remaining constant, at which of the following temperatures will its density become 0.75 d?

30°C

400 K

20°C

300 K

Page 3 of 3

51. A gas expands from a volume 2.0 L at 36°C to a volume of 2.5 L, what is the final temperature, if the pressure is constant?

386 K (which equals 113.25 C)

61.8 K (Which equals -211.2 C)

All of these

247.2 K (Which equals -25.8C)

52. To which mixture of gases Dalton’s law of partial pressure is not applicable

CO₂ and N₂

CH₄ and C₂H₆

CO and CO₂

CHl and NH₃

53. Liquefaction of gas can only be carried out if

The temperature is below the critical and pressure is very high

Without caring for the value critical volume at critical stage

Temperature is above the critical temperature and pressure can have any value

The temperature is more than critical and pressure is 1000 atm

54. How should the conditions be changed to prevent the volume of a given gas from expanding when its mass increased?

Temperature and pressure are both lowered

Temperature is increased and pressure is decreased

Temperature is lowered and pressure is increased

Temperature and pressure both are increased

55. The gases suddenly __________ if these are allowed to expand

Move randomly

Beat up

Cool down

React

56. To measure the true pressure of a gas collected over water, the pressure due to water vapours is

Subtracted from the total pressure

Added to the total pressure

Divided by the total pressure

Multiplied to the total pressure

57. What is the final pressure in a balloon when the volume is changed from 1.5 L to a volume of 2.5L at constant temperature? (Initial pressure is 1.1 atm).

None of these

.66 kPa

.66 atm

4.125 atm

58. Which of the following is not considered as an intermolecular force between molecules?

Vander Waal’s forces

Hydrophobic bonds

Hydrogen bonds

Covalent bonds

59. Aluminum Phosphate has a density of 2.566 g/cm3

Chemical Change

Physical property

Physical Change

Chemical property

60. If the air inside a balloon is heated, the volume will

None of these

Increase

Increase a little, then decrease.

Decrease

61. Which one is not the partial pressure of oxygen in the lungs?

0.1526 atm

116 torr

116 mm of Hg

1 atm

62. The processes of effusion and diffusion are best understand by

Avogadro’s law

Daltons law

Charles law

Grahams law

63. The kinetic theory of gases, which of the following is important for an ideal gas:

None of these

The gases are NOT fluid

The distance between molecules in ideal gases is closer than in liquids or solids.

There is no attraction or repulsion between the gas molecules, whereas there IS attraction between molecules of liquids or solids.

64. The gases become non-ideal at

High temperature and Low pressure

Low temperature and high pressure

High temperature and high pressure

Low temperature and Low pressure

65. An ideal gas cannot be liquefied because

It solidifies before becoming a liquid

Its critical temperature is always above 0°C

Its molecules are relatively small in size

Forces operative between its molecules are negligible

66. Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be

16 gmol¯¹

64 gmol¯¹

48 gmol¯¹

32 gmol¯¹

67. What is the final pressure in a vessel when the volume is changed from 1.3 L to a volume of 1.55 L at constant temperature? (Initial pressure is 1.5 atm).

1.65 L

None of these

1.25 L

1.49 L

68. There is more deviation in the behavior of a gas from the ideal gas equation PV – nRT

At high temperature and low pressure

At low temperature and high pressure

At low temperature and low pressure

At high temperature and high pressure

69. Lind’s method is employed to

Compression of gases

Separation of gases

Expansion of gas

Liquefaction of gases

70. Air at sea level is dense. This is practical application of

Dalton’s law

Charle’s law

Avogadro’s law

Boyl’s law

71. The temperature below which a gas does not exist is called its

Critical temperature

Neutral temperature

Curie point

Inversion temperature

72. Which of the following describes the relationship between P and V?

Directly proportional

Unrelated

Inversely proportional

None of these

73. Which is incorrect in case of ideal gases

Can be liquefied

All molecules move with same speed

PV/RT = n

Behave independently

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Mustansar KhanLast Updated: April 19, 2025

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ECAT Chemistry Forms of Matter Test Online

Chemistry Forms of Matter MCQS Online Test

ECAT Chemistry Forms of Matter Chapter Online Test

ECAT Chemistry Forms of Matter Test

Chemistry

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Chemistry Forms of Matter MCQS Online Test

ECAT Chemistry Forms of Matter Chapter Online Test

ECAT Chemistry Forms of Matter Test

Chemistry

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