Chemistry Forms of Matter Test Online

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Question 1

1. Which of the following statements is false?

Answer

Avogadro number = 6.02 x 10²¹

Answer

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

Answer

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

Answer

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

Question 2

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

Answer

273 k and 76 mm Hg

Answer

273 c and 76 mm Hg

Answer

273 c and 760 mm Hg

Answer

273 k and 760 mm Hg

Question 3

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

Answer

Ina circular path

Answer

In a straight line path

Answer

In a wavy path

Answer

With an accelerated velocity

Question 4

4. 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 5

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

Answer

Avogadro’s law

Answer

Graham’s law

Answer

Dalton’s law

Answer

Charles’s law

Question 6

6. According to kinetic theory of gases there are

Answer

No intermolecular forces of attraction

Answer

Intermolecular attractions

Answer

Molecules which have considerable volume

Answer

The velocity of molecules decreases for each collision.

Question 7

7. Lind’s method is employed to

Answer

Expansion of gas

Answer

Compression of gases

Answer

Separation of gases

Answer

Liquefaction of gases

Question 8

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

Question 9

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

Answer

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

Answer

None of these

Answer

The gases are NOT fluid

Answer

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

Question 10

10. The diffusion of gases at absolute zero will be

Answer

Slightly decreased

Answer

Slightly increased

Question 11

11. An ideal gas cannot be liquefied because

Answer

It solidifies before becoming a liquid

Answer

Forces operative between its molecules are negligible

Answer

Its molecules are relatively small in size

Answer

Its critical temperature is always above 0°C

Question 12

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

Answer

Copper (II) nitrate

Answer

Motion of a Car

Answer

Carbon Dioxide

Question 13

13. 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 14

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

Question 15

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

Answer

Partial pressure

Answer

Atmospheric pressure

Answer

Osmotic pressure

Answer

Vapour pressure

Question 16

16. Liquefaction of gas can only be carried out if

Answer

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

Answer

The temperature is more than critical and pressure is 1000 atm

Answer

Without caring for the value critical volume at critical stage

Answer

The temperature is below the critical and pressure is very high

Question 17

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

Answer

Chemical property

Answer

Chemical Change

Answer

Physical property

Answer

Physical Change

Question 18

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

Answer

Critical temperature

Answer

Standard temperature

Answer

Absolute temperature

Answer

Normal temperature

Question 19

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

Answer

Grahams law

Answer

Daltons law

Answer

Avogadro’s law

Answer

Charles law

Question 20

20. Which one is the correct value of R

Answer

0.082/dm³ atom K¯¹ mol¯¹

Answer

0.082/dtm Cm³ K¯¹ mol¯¹

Answer

0.082/dm³ torr K¯¹ mol¯¹

Answer

0.082/Cm³ torr K¯¹ mol¯¹

Question 21

21. At constant volume temperature is increased then

Answer

Collision frequency will be increases

Answer

Collision on walls will be less

Answer

Collision will not change

Answer

Collision will be in straight line

Question 22

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

Answer

Inversely proportional

Answer

Directly proportional

Answer

None of these

Question 23

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

Answer

CO and CO₂

Answer

CO₂ and N₂

Answer

CH₄ and C₂H₆

Answer

HCl and NH₃

Question 24

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

Answer

Dalton’s law

Answer

Charle’s law

Answer

Avogadro’s law

Answer

Boyl’s law

Question 25

25. 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 26

26. 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 27

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

Answer

No comparison

Answer

None of these

Answer

Multiples equal

Question 28

28. The specific heat of an ideal gas is

Answer

Proportional to T²

Answer

Proportional to T

Answer

Proportional to T³

Answer

Independent of T

Question 29

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

Answer

None of these

Question 30

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

Answer

Increase a little, then decrease.

Answer

None of these

Question 31

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

Answer

At high temperature and high pressure

Answer

At low temperature and high pressure

Answer

At low temperature and low pressure

Answer

At high temperature and low pressure

Question 32

32. 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

64 gmol¯¹

Answer

16 gmol¯¹

Question 33

33. 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 34

34. A pressure of 1Nm¯² is equal to

Answer

One Pascal

Answer

Stalagmometer

Answer

One atmosphere

Question 35

35. A gas has non-ideal behavior at

Answer

High temperature and low pressure

Answer

Low temperature and high pressure

Answer

Low temperature and low pressure

Answer

High temperature and high pressure

Question 36

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

Answer

Vapor pressure

Answer

Hydraulic pressure

Answer

Surface tension

Answer

Aqueous tension

Question 37

37. The specific heat of a gas

Answer

Can have any value between 0 and infinity

Answer

Has two values Cp and Cv

Answer

Has only one value

Answer

Is proportional to the square root of its absolute temperature

Question 38

38. 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 39

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

Answer

Temperature is lowered and pressure is increased

Answer

Temperature is increased and pressure is decreased

Answer

Temperature and pressure are both lowered

Answer

Temperature and pressure both are increased

Question 40

40. Volume of gas become four times if

Answer

Temperature become one fourth at constant pressure

Answer

Temperature become four times at constant pressure

Answer

Temperature becomes two times at constant pressure

Answer

Temperature becomes half at constant pressure

Question 41

41. Which state of matter has the lowest density?

Question 42

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

Answer

6.17 x 10¯²¹ kJ

Answer

6.17 x 10¯²⁰ J

Answer

6.17 x 10¯²¹ J

Answer

7.16 x 10¯²⁰ J

Question 43

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

Answer

Straight line

Question 44

44. Which state of matter has lowest density?

Question 45

45. 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

Answer

Avogadro’s law

Answer

Boyle’s law

Answer

Charle’s law

Answer

Dalton’s law

Question 46

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

Answer

Attraction with air

Answer

Low density

Question 47

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

Answer

Low temperature

Answer

High temperature

Answer

High pressure

Question 48

48. The non-ideal behavior results chiefly from

Answer

Intermolecular attraction only

Answer

Elastic collisions and finite volume

Answer

Intermolecular attraction and infinite volume

Answer

Intermolecular attractions and finite volume

Question 49

49. Which is incorrect in case of ideal gases

Answer

Can be liquefied

Answer

Behave independently

Answer

All molecules move with same speed

Question 50

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?

Question 51

51. Milk turns sour. This is a

Answer

Chemical Change

Answer

Physical Change

Answer

Physical Property

Answer

Chemical Property

Question 52

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

Question 53

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

Answer

Subtracted from the total pressure

Answer

Divided by the total pressure

Answer

Multiplied to the total pressure

Answer

Added to the total pressure

Question 54

54. One mole of a gas refers to

Answer

The number of molecules in one gram of gas

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

Question 55

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

Answer

It cannot be liquefied at any value of P and T

Answer

Its pressure is more than critical pressure

Answer

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

Answer

Its temperature is more than critical temperature

Question 56

56. The gases become non-ideal at

Answer

High temperature and Low pressure

Answer

Low temperature and high pressure

Answer

Low temperature and Low pressure

Answer

High temperature and high pressure

Question 57

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

Answer

0.082 liter-atm K

Answer

0.082 liter-atm¯¹ K mol¯¹

Answer

0.082 liter-atm¯¹ K mol

Answer

0.082 liter-atm K¯¹ mol¯¹

Question 58

58. Ideal gasses have all the following characteristics except.

Answer

All of the above are correct

Answer

The molecules occupy no space

Answer

Collisions among the molecules of an ideal gas are perfectly elastic

Answer

Absence of intermolecular forces

Question 59

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

Answer

Neutral temperature

Answer

Critical temperature

Answer

Curie point

Answer

Inversion temperature

Question 60

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

Answer

Chemical Change, Physical Change

Answer

Physical Change, Chemical Change

Answer

Chemical property, Physical Change

Answer

Physical property, Chemical Change

Question 61

61. 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 62

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

Answer

CHl and NH₃

Answer

CO and CO₂

Answer

CO₂ and N₂

Answer

CH₄ and C₂H₆

Question 63

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

Answer

All molecules behave independently

Answer

All gases cannot be liquefied through Lind’s Method

Answer

All molecules move with same speed

Question 64

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

Answer

Graham’s law

Answer

Hook’s law

Answer

Charles’ law

Answer

Boyle’s law

Answer 200

Move randomly

Answer 201

Directly proportional to square root of temperature

Answer 202

Directly proportional to absolute temperature

Answer 203

Independent of absolute temperature

Answer 204

Inversely proportional to absolute temperature

Answer 205

None of these

Answer 206

Chemical Property

Answer 207

Physical Property

Answer 208

Physical Change

Answer 209

Chemical Change

Answer 210

0.1526 atm

Answer 211

116 mm of Hg

Answer 212

Covalent bonds

Answer 213

Hydrogen bonds

Answer 214

Vander Waal’s forces

Answer 215

Hydrophobic bonds

Answer 216

Vander Waal

Answer 217

All of these

Answer 218

386 K (which equals 113.25 C)

Answer 219

247.2 K (Which equals -25.8C)

Answer 220

61.8 K (Which equals -211.2 C)

Answer 221

Pressure, temperature, and volume of the gas

Answer 222

Volume of the gas

Answer 223

Temperature of the gas

Answer 224

Pressure of the gas

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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