Chemistry Forms of Matter Test Online

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Question 1

1. Average kinetic energy of molecules is

Answer

Directly proportional to absolute temperature

Answer

Directly proportional to square root of temperature

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Inversely proportional to absolute temperature

Answer

Independent of absolute temperature

Question 2

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

Answer

Dalton’s law

Answer

Avogadro’s law

Answer

Charles’s law

Answer

Graham’s law

Question 3

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

Answer

0.1526 atm

Answer

116 mm of Hg

Question 4

4. 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 5

5. A gas has non-ideal behavior at

Answer

High temperature and low pressure

Answer

Low temperature and high pressure

Answer

High temperature and high pressure

Answer

Low temperature and low pressure

Question 6

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

Answer

Molar volume

Answer

Normal volume

Answer

Total volume

Answer

Atomic volume

Question 7

7. Milk turns sour. This is a

Answer

Chemical Change

Answer

Physical Property

Answer

Physical Change

Answer

Chemical Property

Question 8

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

Answer

Inversion temperature

Answer

Curie point

Answer

Critical temperature

Answer

Neutral temperature

Question 9

9. Lind’s method is employed to

Answer

Compression of gases

Answer

Liquefaction of gases

Answer

Separation of gases

Answer

Expansion of gas

Question 10

10. 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 gram of gas

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

Answer

The number of molecules in one liter of gas

Question 11

11. The specific heat of a gas

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Has only one value

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Is proportional to the square root of its absolute temperature

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Can have any value between 0 and infinity

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Has two values Cp and Cv

Question 12

12. 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 13

13. An ideal gas cannot be liquefied because

Answer

It solidifies before becoming a liquid

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Its molecules are relatively small in size

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Its critical temperature is always above 0°C

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Forces operative between its molecules are negligible

Question 14

14. The diffusion of gases at absolute zero will be

Answer

Slightly increased

Answer

Slightly decreased

Question 15

15. Which state of matter has the lowest density?

Question 16

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

Answer

Pressure, temperature, and volume of the gas

Answer

Pressure of the gas

Answer

Volume of the gas

Answer

Temperature of the gas

Question 17

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

Answer

Hook’s law

Answer

Graham’s law

Answer

Boyle’s law

Answer

Charles’ law

Question 18

18. 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 19

19. 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

Multiplied to the total pressure

Answer

Divided by the total pressure

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Added to the total pressure

Question 20

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

Question 21

21. CuSO₄ is dissolved in water

Answer

Chemical Change

Answer

Physical Property

Answer

Physical Change

Answer

Chemical Property

Question 22

22. 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 23

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

Answer

Partial law of volumes

Answer

Ideal gas equation

Answer

Charles’ law

Answer

Perfect gas law

Question 24

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

Answer

Vander Waal

Question 25

25. Which one is the correct value of R

Answer

0.082/dm³ atom K¯¹ mol¯¹

Answer

0.082/dm³ torr K¯¹ mol¯¹

Answer

0.082/dtm Cm³ K¯¹ mol¯¹

Answer

0.082/Cm³ torr K¯¹ mol¯¹

Question 26

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

Answer

CH₄ and C₂H₆

Answer

CO and CO₂

Answer

CHl and NH₃

Answer

CO₂ and N₂

Question 27

27. The specific heat of an ideal gas is

Answer

Proportional to T

Answer

Proportional to T²

Answer

Proportional to T³

Answer

Independent of T

Question 28

28. 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 29

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

Question 30

30. 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 31

31. 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

Avogadro number = 6.02 x 10²¹

Answer

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

Question 32

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

Question 33

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

Answer

None of these

Question 34

34. Which is incorrect in case of ideal gases

Answer

All molecules move with same speed

Answer

Behave independently

Answer

Can be liquefied

Question 35

35. 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 36

36. 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

Answer

0.082 liter-atm¯¹ K mol¯¹

Answer

0.082 liter-atm K

Question 37

37. The non-ideal behavior results chiefly from

Answer

Elastic collisions and finite volume

Answer

Intermolecular attractions and finite volume

Answer

Intermolecular attraction and infinite volume

Answer

Intermolecular attraction only

Question 38

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

Answer

Physical Change

Answer

Chemical Change

Answer

Physical property

Answer

Chemical property

Question 39

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

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 but temperature is less than critical temperature.

Answer

Its pressure is more than critical pressure

Question 40

40. At constant volume temperature is increased then

Answer

Collision frequency will be increases

Answer

Collision will not change

Answer

Collision will be in straight line

Answer

Collision on walls will be less

Question 41

41. 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

386 K (which equals 113.25 C)

Answer

61.8 K (Which equals -211.2 C)

Answer

All of these

Answer

247.2 K (Which equals -25.8C)

Question 42

42. Liquefaction of gas can only be carried out if

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

Answer

The temperature is below the critical and pressure is very high

Question 43

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

Answer

Same as before

Answer

√927/27 times the earlier value

Question 44

44. 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

Dalton’s law

Answer

Boyle’s law

Answer

Charle’s law

Answer

Avogadro’s law

Question 45

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

Answer

At low temperature and high pressure

Answer

At low temperature and low pressure

Answer

At high temperature and low pressure

Answer

At high temperature and high pressure

Question 46

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

Answer

Increase a little, then decrease.

Answer

None of these

Question 47

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

Answer

Normal temperature

Answer

Critical temperature

Answer

Absolute temperature

Answer

Standard temperature

Question 48

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

Answer

Temperature is increased and pressure is decreased

Answer

Temperature and pressure are both lowered

Answer

Temperature and pressure both are increased

Answer

Temperature is lowered and pressure is increased

Question 49

49. Ideal gasses have all the following characteristics except.

Answer

All of the above are correct

Answer

Absence of intermolecular forces

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The molecules occupy no space

Answer

Collisions among the molecules of an ideal gas are perfectly elastic

Question 50

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

Answer

None of these

Answer

Multiples equal

Answer

No comparison

Question 51

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

Answer

Chemical property, Physical Change

Answer

Chemical Change, Physical Change

Answer

Physical Change, Chemical Change

Answer

Physical property, Chemical Change

Question 52

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

Answer

Move randomly

Question 53

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

Answer

48 gmol¯¹

Answer

64 gmol¯¹

Answer

16 gmol¯¹

Answer

32 gmol¯¹

Question 54

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

Answer

Attraction with air

Answer

Low density

Question 55

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

Answer

Aqueous tension

Answer

Surface tension

Answer

Vapor pressure

Answer

Hydraulic pressure

Question 56

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

Answer

Straight line

Question 57

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

Answer

Directly proportional

Answer

Inversely proportional

Answer

None of these

Question 58

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

Answer

Dalton’s law

Answer

Avogadro’s law

Answer

Boyl’s law

Answer

Charle’s law

Question 59

59. Which state of matter has lowest density?

Question 60

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

Answer

Partial pressure

Answer

Vapour pressure

Answer

Atmospheric pressure

Answer

Osmotic pressure

Question 61

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

Answer

Copper (II) nitrate

Answer

Carbon Dioxide

Answer

Motion of a Car

Question 62

62. 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 63

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

Answer

High temperature

Answer

Low temperature

Answer

High pressure

Question 64

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

Answer

Ina circular path

Answer

With an accelerated velocity

Answer

In a straight line path

Answer

In a wavy path

Answer 194

All molecules behave independently

Answer 195

All molecules move with same speed

Answer 196

All gases cannot be liquefied through Lind’s Method

Answer 197

High temperature and Low pressure

Answer 198

Low temperature and high pressure

Answer 199

Low temperature and Low pressure

Answer 200

High temperature and high pressure

Answer 201

None of these

Answer 202

Molecules which have considerable volume

Answer 203

Intermolecular attractions

Answer 204

No intermolecular forces of attraction

Answer 205

The velocity of molecules decreases for each collision.

Answer 206

One Pascal

Answer 207

Stalagmometer

Answer 208

One atmosphere

Answer 209

CO₂ and N₂

Answer 210

HCl and NH₃

Answer 211

CO and CO₂

Answer 212

CH₄ and C₂H₆

Answer 213

Temperature become one fourth at constant pressure

Answer 214

Temperature become four times at constant pressure

Answer 215

Temperature becomes two times at constant pressure

Answer 216

Temperature becomes half at constant pressure

Answer 217

Avogadro’s law

Answer 218

Grahams law

Answer 219

Charles law

Answer 220

Daltons law

Answer 221

Vander Waal’s forces

Answer 222

Hydrogen bonds

Answer 223

Covalent bonds

Answer 224

Hydrophobic bonds

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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