Physical Chemistry MCQs
Physical Chemistry MCQs
Answer these 40 Physical Chemistry MCQs and see how sharp is your knowledge of Physical Chemistry. Scroll down and let's start!
1: _____ ions are those ions that do not change oxidation number or composition during a reaction.
A. Spectator ions
B. Reducing agent
C. Electrolysis
D. Oxidation
E. Oxidation number
2: A specific wave function is called a(n) __________.
A. Orbital
B. Bohr orbit
C. Atomic Orbit
D. None of these
3: Complete the following sentence: the cathode in a voltaic cell is the electrode _____________.
A. To which anions from the salt bridge migrate
B. In which oxidation takes place
C. To which cations from the salt bridge migrate
D. In which electrons become available
4: For a first-order reaction, a plot of ________ versus ________ is linear.
A. Stratosphere
B. Straight line
C. Arrhenius
D. Ln[A]t,t
5: In general, as activation energy increases, reaction rate ________.
A. Goes down regardless of whether the reaction is exothermic or endothermic
B. Goes down if the reaction is exothermic
C. Goes down if the reaction is endothermic
D. Stays the same regardless of whether the reaction is exothermic or endothermic
E. None of the above
6: Neutrons add only ____ to an atom
A. Velosity
B. Mass
C. Pressure
D. None of these
7: Nuclear fusion releases energy in the form of _____
A. Lower nuclei
B. Heavier nuclei
C. Strong nuclei
D. None of these
8: Of the following metals, ________ exhibits multiple oxidation states.
A. Al
B. Na
C. Ni
D. Ca
E. Sr
9: Of the following molecules, only ________ is polar.
A. BeCl2
B. CCl4
C. Cl2
D. BCl3
E. NCl3
10: Of the following species, ________ has the largest radius.
A. Ar
B. Sr2+
C. Kr
D. Br-
E. Rb+
11: Of the following substances, ________ has the highest boiling point.
A. H2O
B. CO2
C. CH4
D. Kr
E. NH3
12: Of the following substances, an aqueous solution of ________ will form basic solutions.
A. NH4Cl, Cu(NO3)2
B. K2CO3, NH4Cl
C. NaF only
D. NaF, K2CO3
E. NH4Cl only
13: Of the following, ________ is the most volatile.
A. CBr4
B. CCl4
C. CF4
D. CH4
E. C6H14
14: Of the following, a 0.1 m aqueous solution of ________ will have the highest freezing point.
A. Na2SO4
B. NaCl
C. Al(NO3)3
D. K2CrO4
15: Of the following, only ________ is not a state function.
A. Energy (E)
B. Enthalpy (H)
C. Heat (q)
D. Temperature (T)
E. Entropy (S)
16: Of the molecules below, only __________ is nonpolar.
A. CO2
B. H2O
C. NH3
D. HCl
E. TeCl2
17: Of the molecules below, the bond in ________ is the most polar.
A. HI
B. HCl
C. H2
D. HBr
E. HF
18: Prokaryotes contain _____ ribosomes.
A. 70S
B. 80S
C. 90S
D. 60S
19: The reaction A → B is first order in [A]. Consider the following data. The concentration of a is ________ m after 40.0 s.
A. 0.025
B. 1.3 × 10-2
C. 3.5 × 10-4
D. 1.2
20: The rate constant of a first-order process that has a half-life of 3.50 min is ________ s-1.
A. 1.65 × 10-2
B. 1.98
C. 0.198
D. 3.30 ×10-3
21: Of the units below, __________ are appropriate for a first-order reaction rate constant.
A. Ms^-1.
B. S^-1.
C. Mol / L
D. M^-1 s^-1.
E. L mol^-1 s-1
22: Appropriate units for the speed of a chemical reaction, the reaction rate, are _______.
A. G/mol
B. Min
C. Sec
D. M/s
23: If a rate law is second order (reactant), doubling the reactant ________ the reaction rate.
A. Quadruples
B. True
C. L mol-1s-1
D. Heterogeneous
24: Of the following, ________ will lower the activation energy for a reaction.
A. Increasing the concentrations of reactants
B. Raising the temperature of the reaction
C. Adding a catalyst for the reaction
D. Removing products as the reaction proceeds
E. Increasing the pressure
25: Of the following, only ________ is a valid unit for reaction rate.
A. G/L
B. G/mol
C. Mol/L−hr
D. Mol/L
E. L/atm
26: The rate of a chemical reaction normally ____
A. Decreases as temperature increases
B. Is slowed down by a catalyst
C. Increases as reactant concentration increases
D. Decreases as reactant concentration increases
27: Oxidation is ____
A. Loss of electrons
B. Two protons are lost
C. Reducing
D. Dissolved
28: When proteins are digested, the following molecules can be absorbed: ________.
A. The presence of a yellow color in the test tube
B. When the solution in the test tube turns pink (acidic)
C. Aminopeptidase, carboxypeptidase, and dipeptidase
D. Amino acids, dipeptides, and tripeptides
29: It's a good idea to refine___________, which is a good study habit
A. Your listening skills
B. Your athletic ability
C. Your class schedule
D. None of these
30: The hybridizations of iodine in if3 and if5 are __________ and __________, respectively.
A. Sp3 , sp3d
B. Sp3d , sp3d 2
C. Sp3d , sp3
D. Sp3d 2 , sp3d
E. Sp3 d2, sp3 d2
31: A quantum of light is a _________.
A. Spread of light of a single frequency
B. Packet of photons of the same frequency
C. Smallest lump of light
D. Fringe of bright light
32: An indirect measurement of the speed of molecules is _____.
A. Temperature
B. Friction
C. Energy
33: If heat is released by a chemical system, an equal amount of heat will be ____.
A. Absorbed by the surroundings
B. Released by the surroundings
C. Destroyed by the reaction
D. Released by the universe
34: The rate law of a reaction is rate = k[d][x]. the units of the rate constant are ________.
A. Mol L⁻¹ s⁻¹
B. L mol⁻¹ s⁻¹
C. Mol2 L⁻² s⁻¹
D. Mol L⁻¹ s⁻²
E. L² mol⁻² s⁻¹
35: Cladistic analysis identifies clades on the basis of ______.
A. The ability to interbreed and produce fertile offspring
B. Analogous structures unique to each group
C. Homologous structures unique to each group
D. Last appearance in the fossil record
36: In a chemical reaction, the element 13al will most preferably ________.
A. Lose three electrons and become positively charged
B. Number of protons but more neutrons than carbon-12
C. Six
D. None of these
37: A burning splint will burn more vigorously in pure oxygen than in air because ________.
A. Oxygen is a catalyst for combustion
B. Oxygen is a reactant in combustion and the concentration of oxygen is higher in pure oxygen than it is in air
C. Nitrogen is a product of combustion and the system reaches equilibrium at a lower temperature
D. Nitrogen is a reactant in combustion and its low concentration in pure oxygen catalyzes the combustion
E. Oxygen is a product of combustion
38: Jackson will experience __________ brain growth when he practices the cello.
A. Early-dependent
B. Experience-expectant
C. Early-expectant
D. Experience-dependent
39: The average ages at which an individual displays certain abilities are known as __________.
A. Fine motor skills
B. Developmental norms
C. Prejudice reduction
D. Error patterns
40: Photons making an image formed with feeble light arrive _________.
A. In spurts
B. Independently
C. All at once
D. In an interconnected way.
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