Liquids

MDCAT • Chemistry

128 MCQs — Click "Reveal" to see the correct answer

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  1. 1
    UHS MDCAT 2008

    Boiling point of H-F is _ H2O.

  2. 2
    UHS MDCAT 2008

    The highest temperature a substance can exist as _ is called its critical temperature.

  3. 3
    UHS MDCAT 2008

    Name the partially miscible liquids from the following?

  4. 4
    UHS MDCAT 2010

    Solubility of Ce2(SO4)3.

  5. 5
    UHS MDCAT 2011

    Melting point of water is higher than petrol, because intermolecular forces in water are:

  6. 6
    UHS MDCAT 2012

    Boiling point constants help us to determine:

  7. 7
    UHS MDCAT 2012

    As the number of solute particles increases, the freezing point of the solution:

  8. 8
    UHS MDCAT 2013

    Molal freezing point constant of water is:

  9. 9
    UHS MDCAT 2013

    If 18.0 g of glucose is dissolved in 1 kg of water, boiling point of this solution should be:

  10. 10
    UHS MDCAT 2014

    The vapor pressure lines for pure as well as solutions of different concentrations are shown. Which line represents pure water?



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  11. 11
    UHS MDCAT 2016

    Freezing point will also be defined as that temperature at which its solid and liquid phases have the same:

  12. 12
    UHS MDCAT 2022

    Which of the following factor does not affect the magnitude of vapor pressure?

  13. 13
    UHS MDCAT 2022

    In liquid, with the change in dipole -dipole forces, there is a change in some physical properties. select the property which Is not affected by the strength of dipole-dipole forces?

  14. 14
    UHS MDCAT 2024

    To boil water at 110℃, external pressure should be:

  15. 15
    PMDC MDCAT 2025

    Which one of the following has higher vapour pressure?

  16. 16
    NUMS MDCAT 2024
    If the external pressure is reduced to half, the boiling point of Ethanol will be:
  17. 17

    The maximum polarizability is exhibited in:

  18. 18
    Balochistan MDCAT 2024
    Which of the following is not a result of capillary action?
  19. 19
    Which of the following liquids show maximum surface tension?
  20. 20
    Sindh MDCAT 2024

    Which of the following possesses the weakest London dispersion forces?

  21. 21
    Distillation under very reduced pressure is _______ distillation:
  22. 22
    The compound which exhibits highest vapour pressure is:
  23. 23
    Which one of the following noble gases will have highest boiling point?
  24. 24
    For boiling point, vapor pressure of liquid does not depend upon:
  25. 25
    Water is liquid at room temperature as compared to ammonia and hydrogen disulphide due to presence of:
  26. 26
    UHS MDCAT 2024
    Boiling point of a liquid is a temperature at which:
  27. 27
    Which one of the following does not have tendency to form hydrogen bonding?
  28. 28
    In order to boil water at 110°C, external pressure should be:
  29. 29
    UHS MDCAT 2023
    Which type of forces exist between Iodine molecules?
  30. 30
    NUMS MDCAT 2023
    The boiling point of ether is less as compared to alcohols and phenols due to:
  31. 31
    Vapour pressure is independent of which factor?
  32. 32
    What is the fact due to which branching decreases boiling point?
  33. 33
    The polar part of the soap and detergents dissolve in water molecules due to:
  34. 34
    Balochistan MDCAT 2023
    At room temperature, Glycerin boils at 290°C. What is the boiling point of Glycerin under vacuum distillation at 50 torr?
  35. 35
    Sindh MDCAT 2023
    Which of the following influences the variation of temperature at which boiling of liquid takes place?
  36. 36
    Water rises in capillary tube because of:
  37. 37
    Which of the following can form hydrogen bonding with each other?
  38. 38
    Compound having lowest boiling point is:
  39. 39
    FMDC MDCAT 2023

    Which of the following molecules are soft and have weak intermolecular forces?

  40. 40
    FMDC MDCAT 2023

    The force of attraction among H2 molecules in solid H2 are:

  41. 41
    Which of the following has the lowest vapour pressure at 20°C?
  42. 42
    UHS MDCAT 2023
    Which is not a property of liquid?
  43. 43
    Which of the following statement explains solubility of ionic substance in water?
  44. 44
    The boiling point of compound is mostly raised by:
  45. 45
    Balochistan MDCAT 2022
    Viscosity of liquid decreases with an increase in:
  46. 46
    Sindh MDCAT 2022
    Falling drop of liquid is spherical due to its:
  47. 47
    Sindh MDCAT 2022
    Viscosity is the measure of:
  48. 48
    The distillation carried out under reduced pressure is called:
  49. 49

    In which of the following molecules hydrogen bond is not present?

  50. 50
    Which of the following compounds has lowest boiling point?
  51. 51
    KPK MDCAT 2022
    Exceptionally low acidic strength of HF is due to:
  52. 52

    Which of the following has highest boiling point?

  53. 53
    NUMS MDCAT 2020 FMDC MDCAT 2022
    Ice floats on the surface of water due to:
  54. 54
    Which of the following has highest surface tension?
  55. 55

    The strongest hydrogen bond is present in:

  56. 56
    When 2 ice cubes are pressed over each other they unite to form one cube due to:
  57. 57
    Which of the following factor does not affect the magnitude of V.P?
  58. 58
    At 0°C, what is the physical state of water?
  59. 59
    Which instrument is used to measure the vapor pressure of a liquid?
  60. 60
    In which of the following does water evaporate earlier?
  61. 61
    Which of the following is not a molecular solid?
  62. 62
    Which of the following has the lowest vapor pressure at 20°C?
  63. 63

    CO2 and SO2 both are tri-atomic molecules but heat of vaporization of SO2 is greater than that of CO2 due to:

  64. 64
    According to Watson and Crick's model of DNA, the DNA molecule consists of a double helix. What type of forces are responsible to keep two strands of DNA together?
  65. 65
    Steam causes severe burns than boiling water. It is due to:
  66. 66
    At higher altitude, the boiling point of water is less than 100°C, this is because of:
  67. 67
    An intermolecular force of attraction X is relatively stronger than the other intermolecular forces, it stabilizes α-helix and β-pleated sheets of proteins. The double helical structure of DNA is also stabilized by this force of attraction. Identify X.
  68. 68
    UHS MDCAT 2010
    Which type of force is present in gasoline?
  69. 69
    Metallic conduction involves the relatively free movement of their _______ throughout the metallic lattice:
  70. 70
    Boiling point of water is higher than petrol, because intermolecular forces in water are:
  71. 71
    In 'H-F' bond, electronegativity difference is 2.0. What is the type of this bond?
  72. 72

    Which of the following substances exhibits hydrogen bonding?

  73. 73
    UHS MDCAT 2011
    DNA molecule is double stranded, in which two chains of DNA are twisted around each other by:
  74. 74
    What is the reason that the ice at 0°C occupies more volume than water?
  75. 75
    In crystal lattice of ice, each O-atom of water molecule is attached to:
  76. 76
    UHS MDCAT 2014
    Ice is less dense than water at:
  77. 77
    At 1489 mmHg, water will boil at:
  78. 78
    UHS MDCAT 2012

    Correct order of boiling points of the given liquids is:

  79. 79
    When water freezes at 0°C its density decreases due to?
  80. 80
    Hydrogen bonding is involved in:
  81. 81

    Which of the following can form hydrogen bonding among its molecules more prominently?

  82. 82
    When two ice cubes are pressed over each other, they unite. This is due to:
  83. 83
    The strongest H-bond is:
  84. 84
    Lower alcohols are soluble in water because:
  85. 85
    When ammonia is dissolved in water, number of hydrogen bonds formed by ammonia?
  86. 86
    The strength of hydrogen bonding is:
  87. 87
    The boiling point of a liquid is that temperature at which:
  88. 88
    Which one of the following would cause severe burning?
  89. 89
    Rate of evaporation of a liquid depends upon:
  90. 90
    Molar heat of vaporization of water is:
  91. 91
    A pressure cooker reduces cooking time because:
  92. 92
    The distillation of a solution under reduced pressure is called:
  93. 93
    At 1 atm pressure, a liquid (I) has the boiling point less than a liquid (II), what can we predict about both the liquids?
  94. 94
    Vapour pressure of a liquid depends upon the following:
  95. 95
    Evaporation is designated as a cooling process because of the reason:
  96. 96
    If we provide very high amount of heat to a liquid its boiling point will:
  97. 97
    The boiling point increases down the zero-group elements due to:
  98. 98
    In order to mention the boiling point of water at 110°C, the external pressure should be:
  99. 99
    Which one of the following has highest volatility?
  100. 100
    The conversion of vapours back into their liquid state is called:
  101. 101
    Vapour pressure of water at 100°C is:
  102. 102
    Which one is false for evaporation?
  103. 103
    The boiling point of water would be highest at:
  104. 104
    Which of the following has highest vapour pressure?
  105. 105
    Vapour pressure of water is 4.579 torr at 0°C and 9.209 torr at 10°C, so increase in vapour pressure from 0°C to 10°C is 4.630 torr. What will be the change in vapour pressure from 90°C to 100°C?
  106. 106
    Nature of bonding affects the properties like:
  107. 107
    Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it?
  108. 108
    The attractive forces between the partial positive end of one molecule and partial negative end of other molecule are called:
  109. 109
    Forces of attraction, which may be present between all kinds of atoms and molecules are:
  110. 110
    The forces which are present between the ions and water molecules are known as:
  111. 111

    Which of the following has strongest intermolecular forces of attraction?

  112. 112
    Which one of the following arrangements usually represents the correct order of increasing interactions?
  113. 113
    Strong dipole-dipole forces among the liquid molecules are responsible for:
  114. 114
    Propanone is miscible in water due to:
  115. 115
    Liquids have no definite shape; it is because:
  116. 116

    In NH3, dominant Van der Waal's force among following is:

  117. 117

    The highest boiling point among the following is for:

  118. 118

    CHCl3 exist in liquid state due to:

  119. 119
    The volatile behavior should be maximum for
  120. 120

    Which of following do not show hydrogen bonding?

  121. 121
    The factor that does not control the vapour pressure of liquid is
  122. 122

    Which relation is correct on the basis of strength of intermolecular forces?

  123. 123
    How much times the strength of Hydrogen bonding is less than covalent bond?
  124. 124
    The boiling point of water at 23.7 torr pressure is
  125. 125
    Which of the following molecules should be more volatile?
  126. 126
    Which of the following has lowest vapour pressure at room temperature?
  127. 127
    Hydrogen bonding is not responsible for the properties of:
  128. 128
    Water has maximum density at: