Category: CHM103 0 CHM103 1 / 50 Which of these alkanes is expected to have the highest viscosity? Octane Nonane Decane Heptane 2 / 50 Gas molecules confined to a container are in a state of ____________ motion Check 3 / 50 The gas law that explain the effusion of gas is ____________ Check 4 / 50 An expression for the combined gas law can be expressed as ________ Check 5 / 50 Physical Chemistry is concern with two major aspects, namely ability to change and Â_____ Check 6 / 50 What is the average speed (actually the root-mean square speed) of a neon atom at 27 C? 610 m/s 183 m/s 3.34 m/s 19.3 m/s 7 / 50 A skillful process of identifying. substituting and using correct apparatus appropriately in the laboratory is called _____ Check 8 / 50 At constant temperature, the gas law that is most suitable is called _____ law Check 9 / 50 -______is a state of matter that does not have a definite shape nor volume Check 10 / 50 The mathematical equation for Boyle's law can be written as ___________ Check 11 / 50 Meter, kelvin, second and kilogram are examples of _______ Check 12 / 50 The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapour pressure of __________ atm. 0.498 0.413 0.79 0.0918 13 / 50 Constituents in a solution can be separated by applying the principle of ___________ Check 14 / 50 Temperature, length, time and mass are examples of ________ Check 15 / 50 In a gas. the molecules on the average are separated by large ______ distances Check 16 / 50 Which one of the following statements most accurately relates the properties of a liquid at room temperature with its intermolecular forces? A liquid with strong intermolecular forces will probably have high boiling point. A liquid with strong intermolecular forces will probably have a low surface tension and a high boiling point. A liquid with strong intermolecular forces will probably have a high surface tension and a high boiling point. A liquid with strong intermolecular forces will probably have a low surface tension and a high boiling point. 17 / 50 The individual pressure of a gas in a mixture of gases is called ______ Check 18 / 50 Modern approach to chemistry deals with equilibrium properties, ability to change and ______ Check 19 / 50 International system of unit or system international can be written as an acronym _______________ Check 20 / 50 An atom on the face-centre of a unit cell is shared by _________ unit cells. One Ten Three Two 21 / 50 The Beckman thermometer IS used in the Beckman's apparatus for determining __________ of a substance Check 22 / 50 At high temperature and low pressure, gases tend to undergo phenomena that is called ___________ Check 23 / 50 The concentration of KBr in a solution prepared by dissolving 2.21 g of KBr in 897 g of water is __________ molal. 2.46 0.0167 0.0207 0.0186 24 / 50 The process of separating a pure substance from a solution is called _______ Check 25 / 50 A solution is prepared by dissolving calcium chloride in water and diluting to 500.0 mL. If this solution contains 44 ppm chloride ions, the concentration of calcium ions is __________ ppm. 22 11 44 88 26 / 50 Apparatus that arc basically used for determining the melting points of substances are called ____________ Check 27 / 50 The gas law that consider the total pressure of a gas as a function of the pressures exerted by the individual gases that make up the mixture is __________ Check 28 / 50 The mathematical equation for Charles law can be written as ________ Check 29 / 50 The rate at which gases diffuse is inversely proportional to the Square root of their ____________ Check 30 / 50 A mixture of iron filings and copper filings could best be separated by _________ distillation sieving magnetic separation adding water, then filtering 31 / 50 Which of the followings is not a characteristic of an ideal solution? It must be colourless There is no enthalpy change on mixing There is no volume change on mixing It must obey Raoult’s law 32 / 50 A plot showing the variation of volume with temperature at constant pressure is called __________ Check 33 / 50 The equation of ideal gas can be expressed as ______ Check 34 / 50 Ethanol dissolved in water would be an example of ___________ a solution between two miscible liquids a suspension between two liquids ethanol and water do not form a solution a solution between a solid and liquid 35 / 50 A gas that obeys all the gas laws is called an ______ Check 36 / 50 ________ is an instrument that can be used to measure the strength of an acid or a base Check 37 / 50 A homogenous materials that contain only one substance is called a ___________ Check 38 / 50 An ideal gas differs from a real gas in that the molecules of an ideal gas __________. have a molecular weight of zero have no attraction for one another have no kinetic energy have an average molecular mass 39 / 50 At low temperature and high pressure, gases tend to __________ Check 40 / 50 Which of the followings will not diffract X-rays? Solid Crystal Liquid Gas 41 / 50 According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because _________ a gas is composed of very small particles. gas particles do not attract or repel one another. gas particles move rapidly. the particles of a gas are very far apart. 42 / 50 At constant pressure, properties of gases that undergo changes are _______ Check 43 / 50 Which measurement describes the pressure of a gas? 2.5 L 1.2 g/L 725 mm Hg 315 K 44 / 50 For 1 mole of an ideal gas, a plot of PV against T will give a straight line whose slope is equal to __________ Check 45 / 50 A liquid will "wet" a surface if: ______ the liquid has a lesser density than the surface the forces between the liquid molecules are weak the liquid has a low vapor pressure the forces between the molecules and the surface are greater than the forces between the molecules of the liquid 46 / 50 At relatively low pressure, there are no ___________ forces between gas molecules Check 47 / 50 In fractional distillation, a mixture of liquids is separated based on their _______ density chemical composition solubility boiling points 48 / 50 Distillation can be used to separate ________ an insoluble solid from a solution a solid from a solid a soluble solid from a solution a liquid from a solution 49 / 50 Which of the following is not a colligative property? Vapour pressure lowering Freezing point depression Increase in latent heat Boiling point elevation 50 / 50 The Henry's law constant for helium gas in water at 30 °C is 0.00037 M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is __________ M. 0.000569 1.3 0.000241 0.00176 Restart quiz Rate this quiz Send feedback
