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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.
Test Helpful For:	ECAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

ECAT Chemistry Forms of Matter Test

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?

None of these

1.94 L

1.6 L

1.5 L

2. 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

The temperature is more than critical and pressure is 1000 atm

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

3. 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).

1.49 L

None of these

1.65 L

1.25 L

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

Charles’s law

Avogadro’s law

Dalton’s law

Graham’s law

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

All molecules behave independently

PV/RT = n

All molecules move with same speed

All gases cannot be liquefied through Lind’s Method

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

Carbon Dioxide

Motion of a Car

Copper (II) nitrate

Ice Cubes

7. 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

8. 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

29, 700 L

3.6 L

9. 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?

300 K

20°C

30°C

400 K

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

CO₂ and N₂

CH₄ and C₂H₆

HCl and NH₃

CO and CO₂

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

95.8 atm

98.5 atm

97.1 atm

96.7 atm

12. 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

13. Which state of matter has lowest density?

Gas

Liquid

Plasma

Solid

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

Parabola

Hyperbola

Straight line

Curve

15. 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?

186,000 L

2.06 L

None of these

1.97 L

16. The specific heat of an ideal gas is

Independent of T

Proportional to T

Proportional to T²

Proportional to T³

17. At constant volume temperature is increased then

Collision will not change

Collision frequency will be increases

Collision on walls will be less

Collision will be in straight line

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

Osmotic pressure

Atmospheric pressure

Partial pressure

Vapour pressure

19. 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.

20. The non-ideal behavior results chiefly from

Elastic collisions and finite volume

Intermolecular attraction and infinite volume

Intermolecular attractions and finite volume

Intermolecular attraction only

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

Inversion temperature

Neutral temperature

Curie point

Critical temperature

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

Vapor pressure

Hydraulic pressure

Aqueous tension

Surface tension

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

Temperature and pressure both are increased

Temperature is increased and pressure is decreased

Temperature and pressure are both lowered

Temperature is lowered and pressure is increased

24. Volume of gas become four times if

Temperature becomes half at constant pressure

Temperature become four times at constant pressure

Temperature becomes two times at constant pressure

Temperature become one fourth at constant pressure

25. Lind’s method is employed to

Compression of gases

Liquefaction of gases

Expansion of gas

Separation of gases

Page 2 of 3

26. 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

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

Charles’ law

Boyle’s law

Hook’s law

Graham’s law

28. A gas has non-ideal behavior at

Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

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

Chales

Vander Waal

Boltzman

Clausius

30. The diffusion of gases at absolute zero will be

Slightly increased

Zero

Slightly decreased

Unchanged

31. One mole of a gas refers to

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

The number of molecules in one liter of gas

The number of molecules in one gram of gas

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

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

Partial law of volumes

Ideal gas equation

Perfect gas law

Charles’ law

33. Which state of matter has the lowest density?

Solid

Gas

Liquid

Plasma

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

Chemical property

Physical Change

Physical property

Chemical Change

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

Decrease

None of these

Increase a little, then decrease.

Increase

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

Pressure, temperature, and volume of the gas

Pressure of the gas

Temperature of the gas

Volume of the gas

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

Normal volume

Molar volume

Atomic volume

Total volume

38. Milk turns sour. This is a

Chemical Change

Chemical Property

Physical Change

Physical Property

39. 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).

.66 kPa

4.125 atm

None of these

.66 atm

40. Which is incorrect in case of ideal gases

PV/RT = n

All molecules move with same speed

Behave independently

Can be liquefied

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

Low temperature

B and C

High pressure

High temperature

42. Average kinetic energy of molecules is

Directly proportional to absolute temperature

Independent of absolute temperature

Inversely proportional to absolute temperature

Directly proportional to square root of temperature

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

Critical temperature

Normal temperature

Absolute temperature

Standard temperature

44. The gases become non-ideal at

Low temperature and high pressure

Low temperature and Low pressure

High temperature and high pressure

High temperature and Low pressure

45. Which one is the correct value of R

0.082/dtm Cm³ K¯¹ mol¯¹

0.082/Cm³ torr K¯¹ mol¯¹

0.082/dm³ torr K¯¹ mol¯¹

0.082/dm³ atom K¯¹ mol¯¹

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

Avogadro’s law

Charle’s law

Dalton’s law

Boyl’s law

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

The gases are NOT fluid

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

None of these

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

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

3.25 L

312,480 L

3.15L

None of these

49. According to kinetic theory of gases there are

No intermolecular forces of attraction

Intermolecular attractions

The velocity of molecules decreases for each collision.

Molecules which have considerable volume

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

1 atm

116 torr

116 mm of Hg

0.1526 atm

Page 3 of 3

51. 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

With an accelerated velocity

Ina circular path

52. 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?

61.8 K (Which equals -211.2 C)

All of these

247.2 K (Which equals -25.8C)

386 K (which equals 113.25 C)

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

7.16 x 10¯²⁰ J

6.17 x 10¯²¹ J

6.17 x 10¯²¹ kJ

6.17 x 10¯²⁰ J

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

Inversely proportional

Unrelated

Directly proportional

None of these

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

64 gmol¯¹

32 gmol¯¹

16 gmol¯¹

48 gmol¯¹

56. Which of the following statements is false?

Avogadro number = 6.02 x 10²¹

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

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

57. A pressure of 1Nm¯² is equal to

Stalagmometer

One atmosphere

One Pascal

One bar

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

Daltons law

Charles law

Grahams law

Avogadro’s law

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

Beat up

React

Cool down

Move randomly

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

0.082 liter-atm K

0.082 liter-atm¯¹ K mol

0.082 liter-atm¯¹ K mol¯¹

0.082 liter-atm K¯¹ mol¯¹

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

CHl and NH₃

CO₂ and N₂

CO and CO₂

CH₄ and C₂H₆

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

Same as before

Halved

√927/27 times the earlier value

Doubled

63. 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

Avogadro’s law

Charle’s law

Boyle’s law

Dalton’s law

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

Effusion

Low density

Attraction with air

Diffusion

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

273 c and 76 mm Hg

273 c and 760 mm Hg

273 k and 76 mm Hg

273 k and 760 mm Hg

66. CuSO₄ is dissolved in water

Chemical Property

Chemical Change

Physical Change

Physical Property

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

Divided by the total pressure

Multiplied to the total pressure

Subtracted from the total pressure

Added to the total pressure

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

Hydrogen bonds

Hydrophobic bonds

Covalent bonds

Vander Waal’s forces

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

Chemical property, Physical Change

Physical property, Chemical Change

Chemical Change, Physical Change

Physical Change, Chemical Change

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

None of these

Multiples equal

No comparison

Different

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

RT/P

PRT

PT/R

P/RT

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

Cl₂

H₂S

N₂O

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

At high temperature and high pressure

At high temperature and low pressure

At low temperature and low pressure

At low temperature and high 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

Chemistry

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