MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 One Pascal is equal to 1 Nm<sup>-2</sup> 1 Nm 1 Nm<sup>-1</sup> 1 Nm<sup>2</sup>
2 One atmosphere is equal ___________ Pascal 760 101325 14.7 1.01325
3 How should the conditions be changed to prevent the volume of a given gas from expanding when its mass in increased temperature is lowered and pressure is increased temperature is increased and pressured is lowered temperature and pressure both are lowered temperature and pressure both are increased
4 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will remain unchanged increase four times reduce to 1/4 be doubled
5 Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0°C 546<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span> 200<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°C</span> 546 K 273 K
6 Which of the following is the unit for pressure of a gas in system international Nm<sup>-2</sup> mm of Hg atmosphere torrr
7 The graph between P onγ-axis and 1/V at x-axis for a given mass of a gas at temperature T is a straight line curved upward curved downward circular
8 Which of the following laws study the pressure-volume relationship of a gas at constant temperature,we get a straight line a curve with different peaks straight line parallel to x-axis a curve called isotherm
9 According to Boyles law, at constant temperature the product of pressure and volume of a given mass of gas is whole number a constant fraction a multiple
10 Which one the following is not postulated in the kinetic molecular theory of gases molecules of all the gases have same size and same mass molecules are in chaotic motion all molecular collisions are elastic the volume of the molecules is negligible
11 If allowed to expand, the gases suddenly heat up move randomly react cool down
12 As gases can adopt the shape of the container so they have no fixed shapes fixed shapes different shapes definite shapes
13 Considering the physical properties of the gases, which of the following statements about particles of gas is not true. The particles orderly arranged randomly moving having wide spaces causing pressure
14 The critical temperature of CO2______°C at 73 atm critical pressure 21.142 28.892 31.142 35.452
15 The mono atomic gas molecules are ______ gas molecules Halogen Zero Noble Both b and c
16 The law of distribution of energy is given by Clausius Maxwell Bernoulli Boltzmann
17 The volume of gas depends upon the ______ molecules Size of Molecular weight Space between Both a and b
18 If the pressure of gas reduced to one half and temperature is increased twice then density of gas will be 4 times 2 times 1/2 times 1/4 times
19 The mass of 8.5 dm3of oxygen gas at 0.0821 atm and -1°C is 100 g 10 g 1 g 0.1 g
20 The value of R in term of dm3torr k-1mol-1 62400 62.4 8.313 0.0821
21 One degree on Celsius scale is ______ time greater then Fahrenheit scale 9/5 5/9 6/5 5/6
22 Charle's law only obeys when temperature takes in ______ scale Celsius Fahrenheit Kelvin Rickey
23 At constant pressure, if the original volume is 546 cm3at which temperature the volume of gas 552 cm3 1°C 2°C 3°C 4°C
24 The temperature at which volume of ideal gas is hypothetically zero is called Absolute zero 0°C OK Both a and c
25 If 250 cm3of hydrogen gas is cooled from 127°C to -73°C at constant pressure then new volume of gas is ______ dm3 0.25 0.375 0.125 0.0625
26 When graph is plot between P and 1/V at constant temperature. A straight line obtains which move toward ______ when temperature increase Pressure axis Volume axis 1/V axis 1/P axis
27 The curve which is obtain from Boyle's law is called as Isochoric Isotherm Adiabatic All of these
28 The pressure of 5dm3gas increase from 250 torr to 500 torr then new volume of gas 500 cm<sup>3</sup> 375 cm<sup>3</sup> 2500 cm<sup>3</sup> None of these
29 The gases law describe the ______ Behaviour of gases Variable Constant Uniform Best
30 The unit of pressure ______ is commonly used by meteorologists mm of Hg Kilopascal Millibar Pound per square inch
31 The one atmospheric pressure of air in term of pound per square inches is 101.325 1.01325 760 14.7
32 The solid particles posses only ______ kinetic energy Translational Rotational Viberational Circular
33 Liquids have definite volume due to Negligible spaces Intermolecular force Motion Both a and b
34 Gases are effused through a whole due to ______ motion Vibration Rotaional Translational Chaotic
35 The state of matter which exist only within a relatively narrow range of temperature and pressure Solid Gas Liquid Plasma
36
37 If v is the volume of one molecule of a gas under given conditions, then Van der Waals constant b is (NAis Avogadro number)
38 NH3gas is liquefied more easily than N2Hence Van der Waals constants a and b of NH<sub>3</sub>&gt; that of N<sub>2</sub> Van der Waals constants a and b of NH<sub>3</sub>&lt; that of N<sub>2</sub> a(NH<sub>3</sub>) &gt; a (N<sub>2</sub>) but b (NH<sub>3</sub>) &lt; b(N<sub>2</sub>) a (NH<sub>3</sub>) &lt; a (N<sub>2</sub>) but b (NH<sub>3</sub>) &gt; b (N<sub>2</sub>)
39 I, II, III are three isotherms as shown in the adjoining figure, respectively at T1T2and T3. The temperatures will be in the order T<sub>1</sub>= T<sub>2</sub>= T<sub>3</sub> T<sub>1</sub>&lt; T<sub>2</sub>&lt; T<sub>3</sub> T<sub>1</sub>&gt; T<sub>2</sub>&gt; T<sub>3</sub> T<sub>1</sub>&gt; T<sub>2</sub>= T<sub>3</sub>
40 Which pair of molecules have debye force Ne and Ne Argon and water Na<sup>+</sup>ion and water Water and water
41 A solid has a sharp melting point slightly above room temperature and is a poor thermal and electrical conductor, its crystal classification by bond type is Ionic Metallic Molecular Covalent
42 In graphite crystal, carbon is sp hybridized sp<sup>2</sup>hybridized sp<sup>3</sup>hybridized None
43 Which of the following is a non-crystalline solids pair Diamond, wood Glass, table salt Wood, glass Sucrose, glass
44 Amorphous substance show
(i) Short and long range order
(ii) Short range order
(iii) Long range order
(iv) Have no sharp melting point
 (i) and (ii) are correct (ii) and (iv) are correct (ii) (iii) and (iv) are correct (i) and (iv) are correct
45 Hydrogen bonding is involved in Solubility Detergents Biological molecules All the above
46 The nature of l2crystals are Metallic Covalent Ionic Molecular
47 Which solids are called true solids Crystalline Vitreous Amorphous Metallic
48 Vapour pressure is not affected by Surface area Intermolecular forces Temperature Nature of liquid
49 Steam causes more seers burns than boiling water. It is due to Latent heat of fusion Latent heat of vaporization Latent heat of sublimation All of above
50 Which of the following has no hydrogen-bonding Diethyl ether Water Ethyl alcohol Phenol
51 When liquid water changes to ice, the volume expands. The expansion in volume is 5% 7% 9% 12%
52 Which of the following molecules should be more volatile HF HCl HBr HI
53 Which one is not related with evaporation Continuous Cooling Exothermic Spontaneous
54 Which element exists as discrete small molecules in the solids state Aluminum Silicon Iodine Sodium
55 Which of the following is not molecular crystal Sugar Iodine Ice Graphite
56 Which of the following liquids have low vapour pressure at 25°C Water Ethyl alcohol Acetone Diethyl ether
57 Covalent solids are composed of Ions Different molecules Neutral atoms Diethyl ether
58 Which one of the following is not true relationship
59 R = 0.08205: atm dm<sup>3</sup>mol<sup>-1</sup>k<sup>-1</sup> J mole<sup>-1</sup>k<sup>-1</sup> Nm mol<sup>-1</sup>k<sup>-1</sup> cal. mol<sup>-1</sup>k<sup>-1</sup>
60 If V1= 5 litres, P1= 2 atm, T1= T2= 273°C and V2= in liter 5 80 125 10
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