Chemistry Forms of Matter Test Online

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Question 1

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

Answer

Straight line

Question 2

2. According to kinetic theory of gases there are

Answer

The velocity of molecules decreases for each collision.

Answer

Molecules which have considerable volume

Answer

No intermolecular forces of attraction

Answer

Intermolecular attractions

Question 3

3. A pressure of 1Nm¯² is equal to

Answer

One atmosphere

Answer

One Pascal

Answer

Stalagmometer

Question 4

4. 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?

Question 5

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

Answer

0.082 liter-atm K¯¹ mol¯¹

Answer

0.082 liter-atm¯¹ K mol¯¹

Answer

0.082 liter-atm K

Answer

0.082 liter-atm¯¹ K mol

Question 6

6. Volume of gas become four times if

Answer

Temperature become four times at constant pressure

Answer

Temperature become one fourth at constant pressure

Answer

Temperature becomes half at constant pressure

Answer

Temperature becomes two times at constant pressure

Question 7

7. Milk turns sour. This is a

Answer

Physical Property

Answer

Physical Change

Answer

Chemical Change

Answer

Chemical Property

Question 8

8. An ideal gas cannot be liquefied because

Answer

Forces operative between its molecules are negligible

Answer

It solidifies before becoming a liquid

Answer

Its molecules are relatively small in size

Answer

Its critical temperature is always above 0°C

Question 9

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

Answer

Vapor pressure

Answer

Aqueous tension

Answer

Hydraulic pressure

Answer

Surface tension

Question 10

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

Question 11

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

Answer

Neutral temperature

Answer

Inversion temperature

Answer

Critical temperature

Answer

Curie point

Question 12

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

Answer

Partial pressure

Answer

Atmospheric pressure

Answer

Vapour pressure

Answer

Osmotic pressure

Question 13

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

Question 14

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

Answer

Avogadro’s law

Answer

Charle’s law

Answer

Boyl’s law

Answer

Dalton’s law

Question 15

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

Answer

Total volume

Answer

Normal volume

Answer

Molar volume

Answer

Atomic volume

Question 16

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

Answer

Vander Waal’s forces

Answer

Hydrogen bonds

Answer

Covalent bonds

Answer

Hydrophobic bonds

Question 17

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

Answer

6.17 x 10¯²⁰ J

Answer

7.16 x 10¯²⁰ J

Answer

6.17 x 10¯²¹ kJ

Answer

6.17 x 10¯²¹ J

Question 18

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

Answer

None of these

Answer

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

Answer

The gases are NOT fluid

Answer

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

Question 19

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

Answer

Added to the total pressure

Answer

Divided by the total pressure

Answer

Multiplied to the total pressure

Answer

Subtracted from the total pressure

Question 20

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

Answer

Standard temperature

Answer

Normal temperature

Answer

Critical temperature

Answer

Absolute temperature

Question 21

21. One mole of a gas refers to

Answer

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

Answer

The number of molecules in one liter of gas

Answer

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

Answer

The number of molecules in one gram of gas

Question 22

22. Which is incorrect in case of ideal gases

Answer

Can be liquefied

Answer

Behave independently

Answer

All molecules move with same speed

Question 23

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

Answer

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

Answer

Its temperature is more than critical temperature

Answer

It cannot be liquefied at any value of P and T

Answer

Its pressure is more than critical pressure

Question 24

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

Answer

48 gmol¯¹

Answer

32 gmol¯¹

Answer

16 gmol¯¹

Answer

64 gmol¯¹

Question 25

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

Answer

With an accelerated velocity

Answer

In a straight line path

Answer

In a wavy path

Answer

Ina circular path

Question 26

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

Answer

None of these

Question 27

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

Answer

None of these

Question 28

28. The diffusion of gases at absolute zero will be

Answer

Slightly increased

Answer

Slightly decreased

Question 29

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

Answer

Perfect gas law

Answer

Charles’ law

Answer

Ideal gas equation

Answer

Partial law of volumes

Question 30

30. 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).

Answer

None of these

Question 31

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

Question 32

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

Answer

Increase a little, then decrease.

Answer

None of these

Question 33

33. At constant volume temperature is increased then

Answer

Collision will not change

Answer

Collision on walls will be less

Answer

Collision frequency will be increases

Answer

Collision will be in straight line

Question 34

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

Answer

√927/27 times the earlier value

Answer

Same as before

Question 35

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

Answer

At high temperature and low pressure

Answer

At high temperature and high pressure

Answer

At low temperature and high pressure

Answer

At low temperature and low pressure

Question 36

36. Which state of matter has the lowest density?

Question 37

37. Average kinetic energy of molecules is

Answer

Independent of absolute temperature

Answer

Inversely proportional to absolute temperature

Answer

Directly proportional to square root of temperature

Answer

Directly proportional to absolute temperature

Question 38

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

Answer

Vander Waal

Question 39

39. 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),

Answer

None of these

Question 40

40. 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?

Answer

None of these

Question 41

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

Answer

Dalton’s law

Answer

Charles’s law

Answer

Avogadro’s law

Answer

Graham’s law

Question 42

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

Answer

No comparison

Answer

Multiples equal

Answer

None of these

Question 43

43. The specific heat of an ideal gas is

Answer

Independent of T

Answer

Proportional to T²

Answer

Proportional to T³

Answer

Proportional to T

Question 44

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

Answer

Physical Change

Answer

Chemical property

Answer

Chemical Change

Answer

Physical property

Question 45

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

Answer

Low temperature

Answer

High pressure

Answer

High temperature

Question 46

46. 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?

Answer

All of these

Answer

247.2 K (Which equals -25.8C)

Answer

386 K (which equals 113.25 C)

Answer

61.8 K (Which equals -211.2 C)

Question 47

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

Answer

273 c and 76 mm Hg

Answer

273 c and 760 mm Hg

Answer

273 k and 76 mm Hg

Answer

273 k and 760 mm Hg

Question 48

48. The gases become non-ideal at

Answer

Low temperature and high pressure

Answer

High temperature and high pressure

Answer

Low temperature and Low pressure

Answer

High temperature and Low pressure

Question 49

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

Answer

116 mm of Hg

Answer

0.1526 atm

Question 50

50. A gas has non-ideal behavior at

Answer

Low temperature and high pressure

Answer

Low temperature and low pressure

Answer

High temperature and low pressure

Answer

High temperature and high pressure

Question 51

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

Answer

Charles’ law

Answer

Hook’s law

Answer

Graham’s law

Answer

Boyle’s law

Question 52

52. Which one is the correct value of R

Answer

0.082/dm³ torr K¯¹ mol¯¹

Answer

0.082/dtm Cm³ K¯¹ mol¯¹

Answer

0.082/dm³ atom K¯¹ mol¯¹

Answer

0.082/Cm³ torr K¯¹ mol¯¹

Question 53

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

Answer

Chemical property, Physical Change

Answer

Physical Change, Chemical Change

Answer

Chemical Change, Physical Change

Answer

Physical property, Chemical Change

Question 54

54. The specific heat of a gas

Answer

Has only one value

Answer

Can have any value between 0 and infinity

Answer

Has two values Cp and Cv

Answer

Is proportional to the square root of its absolute temperature

Question 55

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

Answer

Attraction with air

Answer

Low density

Question 56

56. The non-ideal behavior results chiefly from

Answer

Intermolecular attraction only

Answer

Intermolecular attraction and infinite volume

Answer

Elastic collisions and finite volume

Answer

Intermolecular attractions and finite volume

Question 57

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).

Answer

None of these

Question 58

58. Which of the following statements is false?

Answer

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

Answer

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

Answer

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

Answer

Avogadro number = 6.02 x 10²¹

Question 59

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

Answer

HCl and NH₃

Answer

CH₄ and C₂H₆

Answer

CO and CO₂

Answer

CO₂ and N₂

Question 60

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

Answer

Temperature and pressure are both lowered

Answer

Temperature and pressure both are increased

Answer

Temperature is increased and pressure is decreased

Answer

Temperature is lowered and pressure is increased

Question 61

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

Answer

Volume of the gas

Answer

Temperature of the gas

Answer

Pressure of the gas

Answer

Pressure, temperature, and volume of the gas

Question 62

62. Liquefaction of gas can only be carried out if

Answer

The temperature is below the critical and pressure is very high

Answer

Without caring for the value critical volume at critical stage

Answer

The temperature is more than critical and pressure is 1000 atm

Answer

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

Question 63

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

Answer

Directly proportional

Answer

Inversely proportional

Answer

None of these

Question 64

64. Which state of matter has lowest density?

Answer 194

Separation of gases

Answer 195

Compression of gases

Answer 196

Expansion of gas

Answer 197

Liquefaction of gases

Answer 198

The molecules occupy no space

Answer 199

Collisions among the molecules of an ideal gas are perfectly elastic

Answer 200

All of the above are correct

Answer 201

Absence of intermolecular forces

Answer 202

Move randomly

Answer 203

Physical Change

Answer 204

Chemical Change

Answer 205

Physical Property

Answer 206

Chemical Property

Answer 207

Charles law

Answer 208

Daltons law

Answer 209

Grahams law

Answer 210

Avogadro’s law

Answer 211

Boyle’s law

Answer 212

Avogadro’s law

Answer 213

Charle’s law

Answer 214

Dalton’s law

Answer 215

CO and CO₂

Answer 216

CH₄ and C₂H₆

Answer 217

CHl and NH₃

Answer 218

CO₂ and N₂

Answer 219

All molecules move with same speed

Answer 220

All gases cannot be liquefied through Lind’s Method

Answer 221

All molecules behave independently

Answer 222

Copper (II) nitrate

Answer 223

Carbon Dioxide

Answer 224

Motion of a Car

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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