MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 The kinetic energy of three moles of gas is: 3/2 RT 3 RT 1/2 RT 2 RT
2 The total K.E. of one mole of an ideal gas is given by: 1/2 RT 3/2 RT 1/2 KT 3/2 KT
3 Lind's ,method for liquefaction of gases is based on the principle of: Graham's law of diffusion Joule Thomson effect Avogadro's hypothesis Dalton's law of partial pressure
4 The distribution of energies among the molecules of gases was studied by: Maxwell Coulomb Newton Boltzmann
5 Smell of cooking gas during leakage from gas cylinder is detected because of the property of: Effusion Evapotration Diffusion Conduction
6 The rate of diffusion of a gas is inversely proportional to: Density of a gas Velocity of the gas Viscosity of the gas All of above
7 The diffusion of gasses at absolute zero will be: Slightly decrease unchanged Slightly increased Zero
8 The rate of diffusion of a gas of molar mass 72 as compared to H2will be: Same 6 times 1.4 times 1/6 times
9 Which of the following gases have maximum root mean square velocity at 25°C:
 SO<sub>2</sub> NH<sub>3</sub> CO<sub>2</sub> H<sub>2</sub>S
10 The ratio of diffusion of equal volume of He and SO2is (molecular mass He = 4, SO2 = 64): 1:4 16:1 1:16 4:1
11 Which of the following gases diffuse quickly: N<sub>2</sub> NH<sub>3</sub> CO<sub>2</sub> Cl<sub>2</sub>
12 What can be deduce about two gases which have the same molecular mass: They have same numbers of atoms in a molecule They have same rate of diffusion They have same boiling points They have equal solubility in water at room temprature
13 Which of the following is an example of diffusion? Spreading of smell of flowers in garden Steam condensing on a cold window Bubbles rising in a beaker of boiling water All of above
14 Deep sea divers take oxygen with: A heavy gas A lighter gas An inert gas All of above
15 Dalton's law finds its application during the process of: Digestion Respiration Reproduction All of above
16 The partial pressure of gas can be calculated if we know total pressure of mixture and: Number of protons Number of electrons Number of neutrons Mole fraction of gases
17 Partial pressure of gases in a mixture depend upon: Number of moles Number of protons Number of electrons Number of neutrons
18 Total pressure of mixture of two gases is: The ratio of their partial pressure The product of their partial pressure The difference partial pressure The sum of their partial pressure
19 Which pair of gases do not obey Dalton's law of partial pressures? H2 and He NH3and HCl H2 and O2 N2 and O2
20 One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature. 30 3000 3 300
21 Oxygen molecule is 16 times heavier than: Helium Hydrogen Neon Aluminium
22 Equal volumes of ideal gases contain equal number of molecules at: Same temperature Same pressure Same environmental conditions Both (A) and (B)
23 The value of general gas constant R is derived from: Newton's Cooling law Maxwell's law Avogadro's law Charle's law
24 If R, T, M, V and P are gas constant, temperature, molar mass, volume and pressure then density is given by: M/V RT/M PM/RT V/M
25 Which of the following equation is for idea gas: PV = dRT PR = nTP PM = nRT PV = nRT
26 Which one of the following gases has lowest density at room temperature: NH<sub>3</sub> Ne N<sub>2</sub> CO
27 At same temperature which substance has high kinetic energy: Liquid water N<sub>2</sub>gas in a container Solid piece of iron Solution of alcohol and water
28 If the number of gas molecules are doubled in the certain volume the pressure is: Increased to four times Remains unchanged Doubeld Decrease to half
29 A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of gas: Becomes 4 time Becomes half Becomes 2 time Remains same
30 The volume occupied by 1.4g of N2at STP is: 2.24 dm3 1.12 dm3 112 cm3 22.4 dm3
31 At constant temperature when pressure of a gas is plotted against volume, the curve is: Slanting straight line. Parabolic. Straight line, parallel to pressure axis. Of neither type.
32 Keeping the temperature constant, if the gas is expended: Kinetic energy of molecules will increase. Number of gas molecules increases. Temperature will increase. Pressure will decrease.
33 The highest temperature at which a substance can exist as a liquid is called its: Critical temperature Zero temperature Absolute temperature None of above
34 Absolute temperature of a gas is proportional to: Rotational Kinetic energy Translational Kinetic energy Vibrational Kinetic energy Potential energy
35 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be: Remain uncharged Double Reduced Increased four times
36 The destiny of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to: Viscosity Molar mass Momentum All of above
37 The graph between pressure and volume at constant temperature for gas is: Isobaric Isothermal Isotherm None of above
38 The ratio of volume to temperature on Kelvin scale is constant according to: Charle's law Newton's law Coulomb's law Boyle's law
39 The product of pressure and volume remains constant when temperature and quantity of gas is: Zero Variable Kept constant None of above
40 A graph between P and PV constant temperature and number of moles is parallel to: Y-axis X-axis Z-axis Pressure axis
41 A graph between P and 1/V at constant temperature and number of moles of a gas meets the: Y-axis X-axis Origin None of above
42 Boyle's law does not fall even: Temperature is extremely high. Pressure is extremely high. Mixture of gases is taken. All of above.
43 According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between: V and T P and V P and 1/V P and PV
44 For gas obeying Boyle's law if pressure is double, the volume becomes: Remains constant. Double. One half. None of above.
45 In Boyle's law which of the following pair is variable: Temperature and quantity of a gas. Pressure and volume. Volume and quantity of a gas. Pressure and quantity of a gas.
46 In Boyle's law which of the following pair remains constant: Temperature and quality of a gas. Pressure and quality of a gas. Temperature and pressure. Temperature and quantity of a gas.
47 The relationship between volume of a given amount of gas and prevailing conditions of temperature and pressure are: Charle's law Graham's law Boyle's law Gas laws
48 The intramolecular forces in gases are: Weak. Normal. Very weak. Strong.
49 Liquids are less common than: Solids. Plasmas. Gases. All of above.
50 Gases show uniform behavior towards their: Internal conditions. External conditions. Internal and external conditions. None of above.
51 Cooling happens under the Joule Thomson Effect due to sudden: Contraction. Absorption. Expansion. All of above.
52 In solid, the temperature is the measure of: Rotational kinetic energies. Translational kinetic energies. Vibrational kinetic energies. None of above.
53 In gasses and liquid, temperature is the measure of: Average transnational kinetic energies of molecules. Average vibrational kinetic energies of molecules. Average rotational kinetic energies of molecules. None of above.
54 The rate of diffusion of a gas is: Inversely proportional to its density. Inversely proportional to square root of its molecules mass. Directly proportional to molecular mass. Directly proportional to its density.
55 Gases of air, always remain in random motion and do not settle due to: Difference of molecules masses of air gases. Difference in partial pressure of gas molecules. Unequal number of different gas molecules. Elastic collision of gas molecules.
56 Gases exert pressure on walls of container because the gas molecules: Obey gas laws. Have definite volume. Collide with the walls of container. Collide with each other.
57 All gases can be compressed by: Keeping constant pressure Decreasing pressure Increasing pressure None of above
58 The movement of gas molecules from a region of high pressure to vacuum is called: Evaporation Effusion Conduction Diffusion
59 Which state about gases is not correct? They spread throughout the vessel. Pressure is due to collision. There are larger spaces between the molecules. Molecules are arranged regularly.
60 Which of the following is the simplest form of matter? Gaseous state Liquid state Solid state All of above
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