Whole XI Chemistry Mdcat Online Test-1

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WHOLE XI Chemistry MDCAT ONLINE MOCK TEST

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Test Details:

Subject: Chemistry
Class: 1st year or 11
Chapter name: All PMDC Syllabus Chapters
Test: MDCAT 2024
Book: Sindh Textbook
Total No. Of MCQS: 100
Time Allowed: 100 Minutes
Price: Free

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Created on August 12, 2024 By

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Whole XI Chemistry Test 2024

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1 / 100

1. The spectrum formed when light passes through a gas and the gas atoms absorb specific wavelength of radiation is called ____________. This results in___ with _____ background.

a) Emission line spectrum, bright lines, dark

b) Absorption Line spectrum, Bright lines, dark

c) Absorption line spectrum, Dark lines,white

d) Emission line spectrum, Dark lines,White

2 / 100

2. Energy of a electron in nth orbit can be calculated by following expression:

a) K 1/n²

b) -K 1/n²

c) K n²/z²

d) -K n²/z²

3 / 100

3. Which of the following statement is correct for pi bond?

a) It is stronger due to greater overlap of atomic orbitals

b) Electron cloud is denser around the bond axis

c) It is formed by parallel overlapping of full filled atomic orbitals

d) Electron cloud is denser at above and below the bond axis.

4 / 100

4. Select the correct statement :

a) The bond energy of hetero diatomic molecules is relatively higher

b) Bond length is experimentally determined by x-rat diffraction technique

c) Dipole moment depends upon the polarity as well as geometry of molecule

d) All are correct

5 / 100

5. Value of R when pressure is in atm and volume in dm³:

a) 8.21 atm dm³/mol K

b) 0.0821 atm mol/dm³ K

c) 0.0821 atm dm³/mol K

d) None

6 / 100

6. What will be the unit for van der Waal's constant 'a’

a) atm dm⁶ mole²

b) atm dm⁶/mol²

c) dm³/mol

d) atm dm³/ mol

7 / 100

7. The electrostatic force of attraction between the positive end of one polar molecule and the negative end of other polar molecule is called :

a) Dipole Dipole interaction

b) London Dispersion

c) Hydrogen Bonding

d) Dipole induced Dipole

8 / 100

8. Select the correct statement:

a) Evaporation is an endothermic process

b) Condensation is an endothermic process

c) Droplets formation at the outer.surface of a cold bottle, this process is evaporation.

d) None of the above is correct

9 / 100

9. Which of the following is not a crystalline solid?

a) Sucrose

b) Ferrous Sulphate

c) Magnesium chloride

d) All are crystalline solids

10 / 100

10. The phenomenon in which different solid substances exist in the same crystalline structure is called

a) Isomorphism

b) Allotropy

c) Polymorphism

d) None

11 / 100

11. Given the below characteristics, properties are concerned with?

1)They are malleable and ductile

2)They are good conductors of heat

3)They are good conductors of electricity

a) Ionic Solids

b) Metallic solids

c) Covalent Solids

d) Molecular Solids

12 / 100

12. Select the correct statement for radius ratio.

a) it is the ratio of radius of anion to that of cation

b) It is the radius ratio of cation to that of anion

c) It helps in predicting the shape of metallic solids

d) Both B and C

13 / 100

13. Sodium Chloride unit cell contains a total of ____ ions

a) 4

b) 6

c) 8

d) 12

14 / 100

14. ABAC layer of arrangement is found in ____ and its coordination number is__

a) Hexagonal close packing, 12

b) Hexagonal close packing, 8

c) Body centered cubic,12

d) Body centered cubic, 8

15 / 100

15. If Ksp < Qsp then solution is said to be:

a) Unsaturated

b) Saturated

c) Super saturated

d) All

16 / 100

16. Select the correct statement.

a) Ksp of a saturated solution remain constant

b) Ksp changes with temperature

c) NaCl is obtained by solar evaporation of sea water.

d) All

17 / 100

17. What is correct for Basic buffer?

a) It contains strong base and its salt with strong acid

b) It contains weak Acid and its salt with strong base

c) It contains weak base and its salt with strong acid

d) It contains weak base and it's salt with with acid.

18 / 100

18. Collision theory postulated that the rate of a chemical reaction depends upon:

a) Number of collisions

b) Kinetic Energy

c) Proper orientation of colliding molecules

d) All of these

19 / 100

19. Unit of K from chemical rate equation can be expressed as

a) M/s²

b) M.s

c) dm³/mol.s

d) mol/dm³s

20 / 100

20. A thermodynamic system which do not allow the exchange of mass but permit energy to be transferred is known as

a) Open System

b) Closed System

c) Isolated System

d) All of these

21 / 100

21. At constant pressure the equation for first law of thermodynamic may be written as:

a) qv = ΔH

b) Qp =ΔE

c) QP=ΔH

d) All

22 / 100

22. What is the function of salt bridge?

a) It allows the flow of ions

b) It prevents mixing

c) It maintains neutrality

d) All of these

23 / 100

23. The process of coating a thin layer of zinc on a metal is knows as

a) Electroplating

b) Galvanizing

c) Corrosion

d) Alloying

24 / 100

24. Which is the correct for Electrode above Hydrogen in Electrochemical series?

a) Reducing agent

b) Anode

c) They have stronger tendency to lose electrons

d) All are correct

25 / 100

25. The oxidation number of oxygen in peroxides is:

a) -1

b) -1/2

c) -2

d) +2

26 / 100

26. Orignal volume of a gas is 100cm³ at 25°C at what temperature in°C its volume will become double

a) 596°C

b) 273°C

c) 323°C

d) None

27 / 100

27. Sp3 hybridization with one lone pair gives-----geometry with-----angle

a) Tetrahedral, 109.28°

b) Bipyramidal 107.5°

c) Pyramidal, 107.5°

d) Bent or angular 104.5°

28 / 100

28. Decomposition of Potassium Chlorate occurs in presence of which catalyst:

a) Glycerine

b) MnO2

c) 2% of ethyl alcohol

d) Traces of Cl2

29 / 100

29. Which of the following is a basic buffer solution?

a) H₂CO₃ / NaHCO₃

b) NH₄OH / NH₄Cl

c) CH₃COOH / CH₃COONa

d) NaOH / NH₄Cl

30 / 100

30. Chemical kinetics deal with all of the following except

a) It deals with equilibrium between reactants and products

b) It deals with mechanism of reaction

c) It deals with factors that influence on the rate

d) It deals with rate of reaction

31 / 100

31. What is the Oxidation state of Cl in HClO₄-----?

a) 3+

b) 1+

c) 5+

d) 7+

32 / 100

32. In water molecule bond angle is 104.5° if we replace oxygen with Sulfur then what will be the effect on bond angle?

a) Increase

b) decrease

c) remains same

d) Not

33 / 100

33. The rule dealing with the distribution of electrons in degenerate orbitals is:

a) Afbau principle

b) Pauli exclusion

c) (N+l) rule

d) Hund's rule

34 / 100

34. Heat of system increase at room temperature in:

a) Exothermic reaction

b) Endothermic reaction

c) Both a and b

d) None of these

35 / 100

35. Maximum number of electrons in a shell of an atom is determined by the formula?

a) 2l+1

b) 2n²

c) 4l-1

d) 2l-1

36 / 100

36. Aufbau principle arranges subshells on the basis of:

a) Increasing l value

b) increasing n value

c) increasing energy

d) increasing n+l value

37 / 100

37. The ratio of volume between 4moles of H₂ and 16g of CH₄ is

a) 1:2

b) 1:4

c) 4:1

d) 1:8

38 / 100

38. The total number of electrons that can be accommodated in f subshell?

a) 6

b) 10

c) 14

d) 2

39 / 100

39. Positive rays are also known as

a) X rays

b) Gamma rays

c) Cathode rays

d) Canal rays

40 / 100

40. Balmer series in H-spectrum lies in___region

a) Visible

b) Ultraviolet

c) Infrared

d) Far-red

41 / 100

41. Which of the following is not true for the increase in synthesis of Ammonia by Haber's process

a) Low temperature

b) High pressure

c) Continuous removal of NH₃

d) Continuous addition of NH₃

42 / 100

42. What is not true about Le-Chatelier Principle?

a) Allow to predict the change in concentration of system at equilibrium

b) Allow to predict the change in reaction rate of system at equilibrium

c) Allow to predict the change in pressure of a system at equilibrium

d) Allow to predict the change in temperature of system at equilibrium

43 / 100

43. 10 Pascal is equal to :

a) 0.000098 atm

b) 1.98 atm

c) 10.019Kpascal

d) 4.014psi

44 / 100

44. The real gas behavior is established at:

a) Low Temperature and Low Pressure

b) High Temperature and Low Pressure

c) Low Temperature and High Pressure

d) High Temperature and High Pressure

45 / 100

45. Number of H₂O molecules in 10g of Ice are

a) 3.34 × 10²³

b) 0.331 ×10²³

c) 33.1 ×10²³

d) 10

46 / 100

46. The % of Ca in CaCO3 is----?

a) 12%

b) 40%

c) 48%

d) 52%

47 / 100

47. 27g of Al reacts completely with how much mass of O2 to produce Al2O3?

a) 8g of oxygen

b) 16g of oxygen

c) 32g of oxygen

d) 24g of oxygen

48 / 100

48. Ali gave a ring of 0.5 carot diamond to his bride what is the number of carbon in this carbon ring where (1 carot= 200mg)?

a) 5.02×10²²

b) 9.6×10²²

c) 5.02×10²¹

d) 9.6×10²¹

49 / 100

49. The outer body of dry cell serves as anode, it is made up of :

a) Copper

b) Zinc

c) Lead

d) Iron

50 / 100

50. Limiting reactant is the one which:

a) Is Taken in lesser quantity in gram as compare to other reactant

b) Is Taken in lesser quantity in volume as compare to other reactant

c) Gives maximum amount of product which is required

d) Gives minimum amount of product which is required

51 / 100

51. In reaction given below if 1/2 moles of both reactant is used then how many mole/moles of NH3 are/is produced:

Ca(OH)2 +2NH4Cl(s)⟶ 2NH3(g) + CaCl2 + 2H2O

a) 1

b) 0.5

c) 2

d) 1.5

52 / 100

52. If there are 3.01x10²³ molecules of O2 gas at S.T.P, what will be their volume in cm³?

a) 11.2dm³

b) 112000cm³

c) 1120cm³

d) 11200cm³

53 / 100

53. What is the mass percentage of water in Na₂CO₃·10H₂O, given that its molar mass is 286 g/mol?

a) 62.9%

b) 55.6%

c) 43%

d) 30%

54 / 100

54. At which conditions is the deviation of oxygen gas from ideal behavior Maximum?

a) -80°C and 1 atm

b) -50°C and 5 atm

c) 50°C and 1 atm

d) 200°C and 10 atm

55 / 100

55. When heat is introduced to a gas sample in a closed container, which of the following will inevitably rise?

a) Volatility

b) Molecular volume

c) Ideal gas constant

d) Average molecular speed

56 / 100

56. Which of the following statements is not usually true about amorphous solids?

a) They are anisotropic in nature

b) They are isotropic in nature

c) They melt over a broad range of temperatures.

d) Their particles lack an orderly arrangement

57 / 100

57. Dry ice is an example of:

a) Molecular solid

b) Ionic solid

c) Covalent solid

d) Metallic Solid

58 / 100

58. Hydrogen Bond is present in all except:

a) NH3

b) HF

c) CH₄

d) H₂O

59 / 100

59. Unit of Viscosity:

a) N/s².m.

b) N.s/m

c) N.s.m²

d) None of these

60 / 100

60. The highest level of ionization in a gas is primarily caused by:

a) 𝛽 −rays

b) Neutrons

c) ∝ −rays

d) 𝛾 −rays

61 / 100

61. In the ground state of a nickel atom (Z=28), how many electrons have an azimuthal quantum number of 𝑙 = 0 and 𝑙 = 2, respectively?

a) 8 and 4

b) 12 and 5

c) 10 and 6

d) None

62 / 100

62. Which represents correct values regarding Debye (D) and Coulomb meter (Cm):

a) 1D= 3.336×10-¹⁸ Cm

b) 2D= 6.672×10-¹⁰ Cm

c) 3D= 1.0008×10-¹⁸Cm

d) 1D= 3.336×10-³⁰Cm

63 / 100

63. What is the bond order of nitrogen gas (N₂) based on its molecular orbital configuration?

a) 0

b) 1

c) 2

d) 3

64 / 100

64. Bond length is maximum in:

a) C-C

b) Cl-Cl

c) O-O

d) . N-N

65 / 100

65. Which of the following molecules exhibits the largest bond angle?

a) NH₃

b) CS₂

c) H₂O

d) BF₃

66 / 100

66. Determine the oxidation state of sulfur in the compound sulfuric acid (H₂SO₄).

a) +2

b) +4

c) +6

d) +8

67 / 100

67. Identify the strongest oxidizing agent from the following elements and compounds based on their standard electrode potentials:

a) I₂

b) Br₂

c) Cl₂

d) F₂

68 / 100

68. Consider the reaction:

H2(g) + I2(g) = 2HI(g)

Which of the following is affected by decreasing the volume of the reaction vessel?

I. Rate of reaction

II. Equilibrium concentration of reactants

III. Equilibrium constant (K)

a) I only

b) II only

c) I and II only

d) II and III only

e) I, II & III

69 / 100

69. Consider the reaction:

H2(g) + I2(g) = 2HI(g)

Which of the following is affected by decreasing the volume of the reaction vessel?

I. Rate of reaction

II. Equilibrium concentration of reactants

III. Equilibrium constant (K)

a) I only

b) II only

c) I and II only

d) II and III only

e) I, II & III

70 / 100

70. For which of the following equilibrium has the equilibrium constant dimensionless?

a) C(s) + H₂O(g) ⇌ CO(g) + H₂(g)

b) CH₃OH(l) + CH₃O₂H(l) ⇌ CH₃CO₂CH(l) + H₂O(l)

c) Cu²⁺(aq) + 4NH₃(aq) ⇌ Cu(NH₃)₄²⁺(aq)

d) None of these

71 / 100

71. Which of the following is not considered a state function?

I) Enthalpy

II) Gibbs free energy

III) Work

IV) Heat

V) Entropy

a) I, III, and IV

b) II, III, and IV

c) III and IV

d) II, III, IV, and V

72 / 100

72. All sets of quantum number are correct except:

a) n = 3, l = 1, m = 0

b) n = 2, l = 1, m = -1

c) n = 2, l = 0, m = 1

d) None

73 / 100

73. Which of the following substances has a non-zero enthalpy of formation change, while the others have a zero value?

a) N₂

b) Graphite

c) O₃

d) Oxygen

74 / 100

74. In which condition change of enthalpy is positive:

a) When work done on the piston

b) When work done by the system

c) When Heat change b/w system and surrounding

d) None of these

75 / 100

75. Mass of electron:

a) . 0.052 kg

b) 0.004kg

c) 9.11 × 10-³¹ amu

d) 0.0005 amu

76 / 100

76. Which of the following is an intrinsic property

a) Volume

b) No of moles

c) Pressure

d) Surface Tension

77 / 100

77. The geometry of PCl3 is?

a) Trigonal

b) Tetrahedral

c) Pyramidal

d) square planner

78 / 100

78. The reason that CBr4 has a higher B.P that CCl4 is that

a) CCl4 molecules are more polar

b) CBr4 has greater polarizability

c) CCl4 has greater polarizability

d) CBr4 is more polar

79 / 100

79. Bohr model is not applicable on

a) H+

b) H

c) He+

d) Li2+

80 / 100

80. In d-orbital their are ______ lobes

a) 6

b) 5

c) 18

d) 20

81 / 100

81. 1 mole of Mg has:

a) same number of atoms as 1 mole of H2O

b) A mass equal to 24

c) Same number of atoms as in 0.25 mole of NH3

d) Both B and C

82 / 100

82. What volume of NH3 formed from 16.8 dm³ of N2?

a) 11.2

b) 22.4

c) 33.6

d) 44.8

83 / 100

83. Oxygen molecule is:

a) Diamagnetic with no unpaired electrons

b) Diamagnetic with two unpaired electrons

c) Paramagnetic with two unpaired electrons

d) Paramagnetic with one unpaired electron

84 / 100

84. Total number of bonding pairs and lone pairs in CO2 molecule is

a) 4, 4

b) 2, 4

c) 2, 2

d) 4, 2

85 / 100

85. Carbon atoms in diamond & graphite are in hybrid state respectively:

a) sp3 ,sp3

b) sp2 ,sp3

c) sp2 ,sp2

d) sp3, sp2

86 / 100

86. A solid ‘X’ is non-conductor of electricity possess low melting point & readily

sublimes on heating, hence solid ‘X’ belongs to:

a) Metallic crystals

b) Molecular crystals

c) Ionic crystals

d) Covalent crystals

87 / 100

87. Which statement is incorrect regarding evaporation?

a) It is the spontaneous and continuous escaping of a liquid from its surface into vapour phase

b) It is a surface phenomenon

c) It causes cooling

d) It only occurs at boiling point

88 / 100

88. Which property varies with amount of liquid?

a) Surface tension

b) Vapour pressure

c) Viscosity

d) None of these

89 / 100

89. correct statement of the following is:

a) All gas molecules at same temperature have same K.E

b) At 0K volume of gases would be theoretically zero

c) Partial pressure of gas is proportional to number of moles of gas

d) Product of pressure and volume is constant at constant temperature

e) All of these

90 / 100

90. Real gases behave ideally at;

a) High temperature & low pressure

b) High temperature & high pressure

c) Low temperature & high pressure

d) Low temperature & low pressure

91 / 100

91. Radioactive decay follows ………. kinetics:

a) First order

b) Second order

c) Zero order

d) Third order

92 / 100

92. Rate of reaction at a specific time is called as:

a) . Average rate of reaction

b) Velocity of reaction

c) Instantaneous rate of reaction

d) Both B & C

93 / 100

93. Which gas gives cathode rays of maximum e/m value

a) H2

b) He

c) 02

d) All have same value

94 / 100

94. Maximum value of "n" for an atom is 4, maximum number of electrons in N-shell of same atom is

a) 2

b) 8

c) 18

d) 32

95 / 100

95. Equal moles is hydrogen, nitrogen and oxygen are taken in different containers at same temperature and pressure, containers have equal...

a) Volumes

b) No of atoms

c) No of molecules

d) All of These

96 / 100

96. Heat of formation of HI if

2HI⇨H2 + I2 ∆H= -53KJ

a) -53 KJ/mol

b) + 53KJ/mol

c) -26.5KJ/mol

d) +26.5KJ/mol

97 / 100

97. Which of the following heat always have a positive value....

a) Enthalpy of Formation

b) Enthalpy of Neutralisation

c) Enthalpy of Atomisation

d) Enthalpy of Combustion

98 / 100

98. Oxidizing agent is one which....

a) Oxidizes itself

b) Reduces others

c) Loose electrons

d) None of these

99 / 100

99. Arrange the given species in ascending order of oxidation state of P,

P2O3
P4
H3PO4
PH3

a) 1,2,4,3

b) 3,1,2,4

c) 4,2,1,3

d) 3,2,4,1

100 / 100

100. Kp for the exothermic reaction:

a) Increases by increasing temperature

b) Decreases by increasing pressure

c) Increases by adding catalyst

d) Decreases by increasing temperature

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