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

High pressure

High temperature

Low temperature

B and C

2. Average kinetic energy of molecules is

Inversely proportional to absolute temperature

Independent of absolute temperature

Directly proportional to square root of temperature

Directly proportional to absolute temperature

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

No comparison

Multiples equal

None of these

Different

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

3.15L

312,480 L

None of these

3.25 L

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

CH₄ and C₂H₆

CO₂ and N₂

CO and CO₂

HCl and NH₃

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

Ice Cubes

Carbon Dioxide

Motion of a Car

Copper (II) nitrate

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

Physical property

Physical Change

Chemical Change

Chemical property

8. 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?

2.06 L

None of these

186,000 L

1.97 L

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

1.6 L

None of these

1.5 L

1.94 L

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

Beat up

Move randomly

React

Cool down

11. CuSO₄ is dissolved in water

Physical Property

Physical Change

Chemical Property

Chemical Change

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

Curve

Hyperbola

Parabola

Straight line

13. Ideal gasses have all the following characteristics except.

Collisions among the molecules of an ideal gas are perfectly elastic

All of the above are correct

Absence of intermolecular forces

The molecules occupy no space

14. At constant volume temperature is increased then

Collision will be in straight line

Collision on walls will be less

Collision will not change

Collision frequency will be increases

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

1 atm

116 mm of Hg

116 torr

0.1526 atm

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

Chemical Change, Physical Change

Chemical property, Physical Change

Physical Change, Chemical Change

Physical property, Chemical Change

17. The specific heat of a gas

Has only one value

Is proportional to the square root of its absolute temperature

Has two values Cp and Cv

Can have any value between 0 and infinity

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

Avogadro’s law

Graham’s law

Dalton’s law

Charles’s law

19. The gases become non-ideal at

High temperature and high pressure

Low temperature and Low pressure

Low temperature and high pressure

High temperature and Low pressure

20. Which state of matter has lowest density?

Liquid

Plasma

Solid

Gas

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

0.082 liter-atm¯¹ K mol¯¹

0.082 liter-atm¯¹ K mol

0.082 liter-atm K

0.082 liter-atm K¯¹ mol¯¹

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

Vapour pressure

Osmotic pressure

Partial pressure

Atmospheric pressure

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

98.5 atm

96.7 atm

95.8 atm

97.1 atm

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

Dalton’s law

Charle’s law

Avogadro’s law

Boyl’s law

25. 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

Avogadro’s law

Boyle’s law

Charle’s law

Page 2 of 3

26. The non-ideal behavior results chiefly from

Intermolecular attractions and finite volume

Elastic collisions and finite volume

Intermolecular attraction and infinite volume

Intermolecular attraction only

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

Temperature is increased and pressure is decreased

Temperature is lowered and pressure is increased

Temperature and pressure both are increased

Temperature and pressure are both lowered

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

N₂O

Cl₂

H₂S

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

Increase a little, then decrease.

Decrease

None of these

Increase

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

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.

None of these

The gases are NOT fluid

31. 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).

4.125 atm

.66 atm

.66 kPa

None of these

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

Total volume

Normal volume

Molar volume

Atomic volume

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

6.17 x 10¯²⁰ J

6.17 x 10¯²¹ kJ

7.16 x 10¯²⁰ J

6.17 x 10¯²¹ J

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

Vander Waal

Boltzman

Chales

Clausius

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

Hydrogen bonds

Covalent bonds

Vander Waal’s forces

Hydrophobic bonds

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

All molecules move with same speed

All molecules behave independently

PV/RT = n

All gases cannot be liquefied through Lind’s Method

37. Which state of matter has the lowest density?

Liquid

Plasma

Gas

Solid

38. 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?

400 K

20°C

30°C

300 K

39. 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?

247.2 K (Which equals -25.8C)

386 K (which equals 113.25 C)

All of these

61.8 K (Which equals -211.2 C)

40. Which is incorrect in case of ideal gases

Behave independently

All molecules move with same speed

PV/RT = n

Can be liquefied

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

273 k and 760 mm Hg

273 k and 76 mm Hg

273 c and 76 mm Hg

273 c and 760 mm Hg

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

Temperature of the gas

Volume of the gas

Pressure of the gas

Pressure, temperature, and volume of the gas

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

At low temperature and high pressure

At low temperature and low pressure

At high temperature and low pressure

At high temperature and high pressure

44. 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

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

Perfect gas law

Ideal gas equation

Partial law of volumes

Charles’ law

46. 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).

1.25 L

1.49 L

None of these

1.65 L

47. Volume of gas become four times if

Temperature become four times at constant pressure

Temperature becomes two times at constant pressure

Temperature become one fourth at constant pressure

Temperature becomes half at constant pressure

48. A gas has non-ideal behavior at

Low temperature and low pressure

Low temperature and high pressure

High temperature and low pressure

High temperature and high pressure

49. 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

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

Normal temperature

Standard temperature

Absolute temperature

Critical temperature

Page 3 of 3

51. A pressure of 1Nm¯² is equal to

One atmosphere

One Pascal

One bar

Stalagmometer

52. The specific heat of an ideal gas is

Proportional to T²

Independent of T

Proportional to T

Proportional to T³

53. Lind’s method is employed to

Separation of gases

Compression of gases

Expansion of gas

Liquefaction of gases

54. 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),

29, 700 L

2.97 L

None of these

3.6 L

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

In a straight line path

In a wavy path

Ina circular path

With an accelerated velocity

56. Liquefaction of gas can only be carried out if

The temperature is more than critical and pressure is 1000 atm

The temperature is below the critical and pressure is very high

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

Without caring for the value critical volume at critical stage

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

Diffusion

Low density

Attraction with air

Effusion

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

RT/P

PT/R

PRT

P/RT

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

CH₄ and C₂H₆

CO and CO₂

CHl and NH₃

CO₂ and N₂

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

Its pressure is more than critical pressure

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 but temperature is less than critical temperature.

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

None of these

Unrelated

Directly proportional

Inversely proportional

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

Curie point

Critical temperature

Inversion temperature

Neutral temperature

63. The diffusion of gases at absolute zero will be

Slightly decreased

Slightly increased

Zero

Unchanged

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

Daltons law

Avogadro’s law

Charles law

Grahams law

65. An ideal gas cannot be liquefied because

Its molecules are relatively small in size

It solidifies before becoming a liquid

Its critical temperature is always above 0°C

Forces operative between its molecules are negligible

66. Which of the following statements is false?

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

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

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

Avogadro number = 6.02 x 10²¹

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

Halved

√927/27 times the earlier value

Same as before

Doubled

68. According to kinetic theory of gases there are

Molecules which have considerable volume

Intermolecular attractions

No intermolecular forces of attraction

The velocity of molecules decreases for each collision.

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

Aqueous tension

Surface tension

Hydraulic pressure

Vapor pressure

70. Which one is the correct value of R

0.082/dtm Cm³ K¯¹ mol¯¹

0.082/dm³ atom K¯¹ mol¯¹

0.082/dm³ torr K¯¹ mol¯¹

0.082/Cm³ torr K¯¹ mol¯¹

71. Milk turns sour. This is a

Physical Change

Chemical Property

Chemical Change

Physical Property

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

64 gmol¯¹

16 gmol¯¹

48 gmol¯¹

32 gmol¯¹

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

Added to the total pressure

Divided by the total pressure

Multiplied to the total pressure

Subtracted from the total pressure

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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

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