Q. Which of the following statements is true regarding enthalpy?
-
A.
Enthalpy is a state function
-
B.
Enthalpy depends on the path taken
-
C.
Enthalpy cannot be measured
-
D.
Enthalpy is always positive
Solution
Enthalpy is a state function, meaning it depends only on the initial and final states, not the path taken.
Correct Answer: A — Enthalpy is a state function
Learn More →
Q. Which of the following statements is true regarding entropy?
-
A.
Entropy is a state function.
-
B.
Entropy can never decrease.
-
C.
Entropy is independent of temperature.
-
D.
Entropy is always positive.
Solution
Entropy is a state function, meaning it depends only on the state of the system and not on how it reached that state.
Correct Answer: A — Entropy is a state function.
Learn More →
Q. Which of the following statements is true regarding Gibbs Free Energy?
-
A.
ΔG is always positive for spontaneous processes.
-
B.
ΔG = ΔH - TΔS.
-
C.
ΔG can never be negative.
-
D.
ΔG is independent of temperature.
Solution
The correct equation for Gibbs Free Energy is ΔG = ΔH - TΔS, which relates enthalpy, entropy, and temperature.
Correct Answer: B — ΔG = ΔH - TΔS.
Learn More →
Q. Which of the following statements is true regarding ideal solutions?
-
A.
They obey Raoult's Law at all concentrations.
-
B.
They do not exhibit any deviation from Raoult's Law.
-
C.
They have a constant boiling point.
-
D.
They have a variable composition.
Solution
Ideal solutions obey Raoult's Law without any deviation, meaning their properties are consistent with the law across all concentrations.
Correct Answer: B — They do not exhibit any deviation from Raoult's Law.
Learn More →
Q. Which of the following statements is true regarding mesomeric effect?
-
A.
It is a permanent effect
-
B.
It is a temporary effect
-
C.
It only applies to alkenes
-
D.
It increases acidity
Solution
The mesomeric effect is a permanent effect due to the delocalization of electrons.
Correct Answer: A — It is a permanent effect
Learn More →
Q. Which of the following statements is true regarding non-ideal solutions?
-
A.
They obey Raoult's Law perfectly.
-
B.
They show positive or negative deviations from Raoult's Law.
-
C.
Their vapor pressure is always higher than predicted by Raoult's Law.
-
D.
They cannot be formed by mixing two volatile liquids.
Solution
Non-ideal solutions show positive or negative deviations from Raoult's Law due to interactions between different molecules.
Correct Answer: B — They show positive or negative deviations from Raoult's Law.
Learn More →
Q. Which of the following statements is true regarding optical isomers?
-
A.
They are superimposable
-
B.
They have identical physical properties
-
C.
They rotate plane-polarized light in opposite directions
-
D.
They have different molecular formulas
Solution
Optical isomers, or enantiomers, rotate plane-polarized light in opposite directions.
Correct Answer: C — They rotate plane-polarized light in opposite directions
Learn More →
Q. Which of the following statements is true regarding Raoult's Law?
-
A.
It applies to all types of solutions.
-
B.
It is only applicable to ideal solutions.
-
C.
It can be used for any solute-solvent combination.
-
D.
It is not applicable to volatile solutes.
Solution
Raoult's Law is primarily applicable to ideal solutions, where the solute and solvent behave similarly.
Correct Answer: B — It is only applicable to ideal solutions.
Learn More →
Q. Which of the following statements is true regarding redox reactions?
-
A.
Oxidation involves gain of electrons.
-
B.
Reduction involves loss of electrons.
-
C.
Oxidizing agents are reduced.
-
D.
Reducing agents are oxidized.
Solution
Oxidizing agents are reduced in redox reactions.
Correct Answer: C — Oxidizing agents are reduced.
Learn More →
Q. Which of the following statements is true regarding the -I effect?
-
A.
It stabilizes carbocations
-
B.
It destabilizes carbanions
-
C.
It withdraws electron density
-
D.
It donates electron density
Solution
-I effect withdraws electron density, which can destabilize carbocations and stabilize carbanions.
Correct Answer: C — It withdraws electron density
Learn More →
Q. Which of the following statements is true regarding the activation energy (Ea) of a reaction?
-
A.
It is always positive
-
B.
It can be negative
-
C.
It is independent of temperature
-
D.
It is the energy of the products
Solution
The activation energy (Ea) of a reaction is always positive.
Correct Answer: A — It is always positive
Learn More →
Q. Which of the following statements is true regarding the activation energy?
-
A.
It is always positive
-
B.
It can be negative
-
C.
It is independent of temperature
-
D.
It is the energy of products
Solution
Activation energy is always positive as it represents the minimum energy required for a reaction to occur.
Correct Answer: A — It is always positive
Learn More →
Q. Which of the following statements is true regarding the boiling point of a liquid?
-
A.
It is constant regardless of pressure.
-
B.
It increases with increasing atmospheric pressure.
-
C.
It decreases with increasing atmospheric pressure.
-
D.
It is the same for all liquids.
Solution
The boiling point of a liquid increases with increasing atmospheric pressure.
Correct Answer: B — It increases with increasing atmospheric pressure.
Learn More →
Q. Which of the following statements is true regarding the complex ion [Fe(CN)6]3-?
-
A.
It is a high-spin complex
-
B.
It is a low-spin complex
-
C.
It has a coordination number of 4
-
D.
It is paramagnetic
Solution
[Fe(CN)6]3- is a low-spin complex due to the strong field ligand CN-, which causes pairing of electrons.
Correct Answer: B — It is a low-spin complex
Learn More →
Q. Which of the following statements is true regarding the complex [Co(NH3)6]3+?
-
A.
It is tetrahedral
-
B.
It is octahedral
-
C.
It is square planar
-
D.
It has no unpaired electrons
Solution
[Co(NH3)6]3+ is octahedral in geometry due to the six ligands surrounding the cobalt ion.
Correct Answer: B — It is octahedral
Learn More →
Q. Which of the following statements is true regarding the complex [Cu(NH3)4]SO4?
-
A.
Cu is in +1 oxidation state
-
B.
Cu is in +2 oxidation state
-
C.
NH3 is a monodentate ligand
-
D.
All of the above
Solution
In [Cu(NH3)4]SO4, copper is in +2 oxidation state, NH3 is a monodentate ligand, making the statement 'All of the above' incorrect.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following statements is true regarding the energy levels of molecular orbitals?
-
A.
σ orbitals are always lower in energy than π orbitals.
-
B.
π orbitals are always lower in energy than σ orbitals.
-
C.
For second period elements, σ2p is lower than π2p.
-
D.
Bonding orbitals are higher in energy than antibonding orbitals.
Solution
For second period elements, σ2p is lower in energy than π2p.
Correct Answer: C — For second period elements, σ2p is lower than π2p.
Learn More →
Q. Which of the following statements is true regarding the equilibrium constant (K) for a reaction?
-
A.
K is temperature dependent
-
B.
K is pressure dependent
-
C.
K is concentration dependent
-
D.
K is always equal to 1
Solution
The equilibrium constant (K) is dependent on temperature; it changes with temperature variations.
Correct Answer: A — K is temperature dependent
Learn More →
Q. Which of the following statements is true regarding the equilibrium constant Kc?
-
A.
Kc is temperature dependent
-
B.
Kc is pressure dependent
-
C.
Kc is concentration dependent
-
D.
Kc is independent of the reaction
Solution
The equilibrium constant Kc is dependent on temperature; changing the temperature will change the value of Kc.
Correct Answer: A — Kc is temperature dependent
Learn More →
Q. Which of the following statements is true regarding the inductive effect?
-
A.
It is a temporary effect.
-
B.
It operates through pi bonds.
-
C.
It is stronger than the mesomeric effect.
-
D.
It decreases with distance.
Solution
The inductive effect decreases with distance from the electronegative atom or group.
Correct Answer: D — It decreases with distance.
Learn More →
Q. Which of the following statements is true regarding the Langmuir adsorption isotherm?
-
A.
It assumes a monolayer adsorption.
-
B.
It applies to multilayer adsorption.
-
C.
It is temperature independent.
-
D.
It is only applicable to gases.
Solution
The Langmuir adsorption isotherm assumes that adsorption occurs in a monolayer on a surface with a finite number of identical sites.
Correct Answer: A — It assumes a monolayer adsorption.
Learn More →
Q. Which of the following statements is true regarding the mesomeric effect?
-
A.
It can only be observed in aliphatic compounds.
-
B.
It involves the movement of sigma electrons.
-
C.
It is responsible for the stability of resonance structures.
-
D.
It is a short-range effect.
Solution
The mesomeric effect is responsible for the stability of resonance structures due to the delocalization of pi electrons.
Correct Answer: C — It is responsible for the stability of resonance structures.
Learn More →
Q. Which of the following statements is true regarding the molecular orbital configuration of O2?
-
A.
It has 2 unpaired electrons
-
B.
It has 4 unpaired electrons
-
C.
It is diamagnetic
-
D.
It has a bond order of 3
Solution
O2 has 2 unpaired electrons in its molecular orbital configuration, making it paramagnetic.
Correct Answer: A — It has 2 unpaired electrons
Learn More →
Q. Which of the following statements is true regarding the molecular orbital theory?
-
A.
It only applies to diatomic molecules.
-
B.
It explains the magnetic properties of molecules.
-
C.
It does not consider electron spin.
-
D.
It is less accurate than valence bond theory.
Solution
Molecular orbital theory explains the magnetic properties of molecules, such as paramagnetism in O2.
Correct Answer: B — It explains the magnetic properties of molecules.
Learn More →
Q. Which of the following statements is true regarding the rate of a reaction?
-
A.
It increases with increasing temperature
-
B.
It decreases with increasing concentration
-
C.
It is constant for all reactions
-
D.
It is independent of the nature of reactants
Solution
The rate of a reaction generally increases with increasing temperature.
Correct Answer: A — It increases with increasing temperature
Learn More →
Q. Which of the following statements is true regarding the rate of reaction?
-
A.
It is always constant
-
B.
It decreases with time for a reactant
-
C.
It increases with time for a product
-
D.
Both B and C
Solution
The rate of reaction decreases with time for a reactant and increases with time for a product.
Correct Answer: D — Both B and C
Learn More →
Q. Which of the following statements is true regarding the Van der Waals equation?
-
A.
It accounts for the volume of gas particles.
-
B.
It is only applicable to ideal gases.
-
C.
It does not consider intermolecular forces.
-
D.
It is a linear equation.
Solution
The Van der Waals equation accounts for the volume of gas particles and intermolecular forces.
Correct Answer: A — It accounts for the volume of gas particles.
Learn More →
Q. Which of the following states of matter can be compressed the most?
-
A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Plasma
Solution
Gases can be compressed the most due to the large spaces between particles.
Correct Answer: C — Gas
Learn More →
Q. Which of the following states of matter has a definite shape and volume?
-
A.
Gas
-
B.
Liquid
-
C.
Solid
-
D.
Plasma
Solution
Solids have a definite shape and volume due to closely packed particles.
Correct Answer: C — Solid
Learn More →
Q. Which of the following states of matter has the highest density?
-
A.
Gas
-
B.
Liquid
-
C.
Solid
-
D.
Plasma
Solution
Solids generally have the highest density due to closely packed particles.
Correct Answer: C — Solid
Learn More →
Showing 2641 to 2670 of 2802 (94 Pages)