MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 The relative rates of diffusion of  a gas (Mol.wt.=98) as compared to hydrogen will be 1/7 1/5 1/4 1
2 The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on Pressure of the gas Temperature of the gas Volume of the gas Pressure,temperature,and volume of the gas.
3 Which of the following statement is correct if the intermolecular forces in liquids A,B and C are in the order A < B < C? B evaporates more readily than A B evaporates less readily than C A and B &nbsp;evaporates at the same rate A evaporates more readily than C
4 The density of a gas is 1.964 g dm-3 at 273K and 76 cm Hg The gas is CH<sub>4</sub> CO<sub>2</sub> C<sub>2</sub>H<sub>4</sub> Xe
5 Critical temperature for a gas depends upon Shape of molecule Size of molecules Inter molecular forces All of these
6 Pressure remain constant at which temperature the volume of gas becomes twice of what it is at 0°C 546&nbsp;°C 546K 200°C 273K
7 Which of the following gas will have lowest rate of diffusion CH<sub>4</sub> N<sub>2</sub> NH<sub>3</sub> CO<sub>2</sub>
8 Observed pressure of gas on the walls of container is less than actual pressure due to Hephazard motion Inter molecular attractive forces Elastic collision Repulsive forces
9 The deviation of a gas from ideal behaviour is maximum at -10°C and 5.0 atm 100°C and 2.0 atm -10°C and 2.0 atm 0°C and 2.0 atm
10 Units of van der Waals constant a is atm dm<sup>6</sup>/mol<sup>2</sup> &amp; Nm<sup>4</sup>/mol<sup>2</sup> atm dm<sup>4</sup>/mol<sup>2</sup>&nbsp;&amp; Nm<sup>4</sup>/mol<sup>2</sup> atm dm<sup>4</sup>/mol<sup>2</sup>&nbsp;&amp; Nm<sup>6</sup>/mol<sup>2</sup> None of these
11 A line parallel to x-axis is obtained when graph is drawn between Volume on abscissa &amp; pressure on ordinate Volume on abscissa &amp; PV on ordinate at all conditions Pressure on abscissa &amp; PV on ordinate at constant temperature None of these
12 Sudden expansion of gas molecule cause cooling because Expansion release some amount of energy During expansion new force of attraction are developed and energy is released During expansion force of attraction between closest molecules break and energy is used Kinetic energy of gas molecules increases
13 Which of the following gas cannot be liquefied by Linde s method H<sub>2</sub>O vapours N<sub>2</sub> H<sub>2</sub> CO<sub>2</sub>
14 In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains Double Same Half Four times
15 The process of effusion is best understood by law Grahams Boyle s&nbsp; Charles s Avogadro s
16 Equal masses of methane and oxygen are mixed in an empty container at 25°C The fraction of total pressure exerted by oxygen is 1/3 1/9 8/9 16/17
17 Charles s law is only satisfied if temperature is taken on Kelvin scale (b) Celsius scale (°C) Fahrenheit scale (°F) All of these
18 Van der Waals equation explains the behaviour of Real gases Mixture of gases Ideal gas Diatomic gases
19 Which of the following substance has maximum critical temperature H<sub>2</sub>O N<sub>2</sub> SO<sub>2</sub> Ne
20 Plasma was introduced by Crookes Soddy Faraday Van der Waal
21 The unit of R depends on Mole Pressure volume Temperature None of these
22 Which of the following is not the application of plasma Fluorescent light bulb Removal of hazardous chemical Neon signs Corrosion effective
23 The sun is a ball of plasma heated by nuclear fusion is 1.0 million km 2.0 million km 1.5 million km 2.5 million km
24 At higher temperature isotherm moves away from y-axis because of increase in Pressure Number of moles Volume Mass
25 Air contains 78% N2, 21% O2 and 1% other gases at sea level the partial pressure of O2 is 760 torr 159 torr 592 torr 7.6 torr
26 Graham s law refers to Boiling point of gases Gas compression problems Gaseous diffusion Volume changes of gases due to change in temperature
27 A real gas obeying van der Waals equation will resemble ideal gas if Both a and b are large a is large and b is small Both a and b are small a is small and b is large
28 Which of the following is exact relationship between °F and C° °F= 5/9[°C-32] °C = 5/9 [°F]+32 °F = 9/5°C+32 All
29 In intense electrical field and at a very high temperature matter generally exist in Solid state Plasma state Liquid state Gaseous state
30 Pressure of 1Nm-2 is equal to One bar 1 psi One pascal One atmosphere
31 General gas equation is combination of Boyle s law Avogadro s law Charles s law All of these
32 Temperature at which molecular motion ceases is called Absolute zero Absolute temperature Critical temperature Difficult to predict
33 The highest temperature at which gas can be liquefied and above which liquefaction is impossible is called Boiling temperature Upper consulate temperature Transition temperature Critical temperature
34 The rate of diffusion of hydrogen gas is three times than that of an unknown gas at same temperature and pressure than the molar mass of unknown gas is 32 18 16 27
35 Which of the following formula is correct for density of any gas d = RT/PM d = PM/RT d = MT/PR d = RM/PT
36 Which of the following gases shows more ideal behaviour at 0°C <font color="#000000" face="Georgia" size="4"><span style="line-height: 23.390625px;">H<sub>2</sub></span></font> CH<sub>4</sub> He NH<sub>3</sub>
37 Compressibility factor for an ideal gas is 1.5 1.0 2.0 0.5
38 Under which conditions real gases deviate from ideal behaviour Low temperature and low pressure Low temperature and high pressure High temperature and high pressure High temperature and low pressure
39 The value of van der Waal s constant a for gases CO2, N2, and SO2, are 3.59 ,1.39, 1.36, and 6.17 atm dm6 mol-2 respectively the gas which can be most easily liquefied is  CO<sub>2</sub> O<sub>2</sub> N<sub>2</sub> SO<sub>2</sub>
40 Liquids are less common than solids and gases because They exist in narrow range of temperature and pressure They have definite volume Liquid molecules can slide past each other Molecules contain three type of motion
41 Relationship between volume of a gas and prevailing conditions of temperature and pressure are called Gas laws Equilibrium laws Rate laws None of these
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