Engineering & Architecture Admissions
Q. Which of the following statements is true regarding adsorption?
A.
Adsorption is always an exothermic process
B.
Adsorption increases with increasing temperature
C.
Adsorption is a bulk phenomenon
D.
Adsorption does not depend on surface area
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Solution
Adsorption is generally an exothermic process, as it releases energy.
Correct Answer: A — Adsorption is always an exothermic process
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Q. Which of the following statements is true regarding Ampere's Law?
A.
It applies only to static currents
B.
It can be used for time-varying fields
C.
It is valid in all geometries
D.
It is independent of the medium
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Solution
Ampere's Law is primarily applicable to static currents and requires modifications for time-varying fields.
Correct Answer: A — It applies only to static currents
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Q. Which of the following statements is true regarding an endothermic reaction?
A.
Heat is released
B.
Heat is absorbed
C.
No heat change
D.
It occurs spontaneously
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Solution
In an endothermic reaction, heat is absorbed from the surroundings.
Correct Answer: B — Heat is absorbed
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Q. Which of the following statements is true regarding catalysts?
A.
They are consumed in the reaction
B.
They increase the activation energy
C.
They provide an alternative pathway
D.
They change the equilibrium constant
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Solution
Catalysts provide an alternative pathway with a lower activation energy, thus increasing the reaction rate without being consumed.
Correct Answer: C — They provide an alternative pathway
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Q. Which of the following statements is true regarding chemisorption?
A.
It is a reversible process.
B.
It involves the formation of a chemical bond.
C.
It occurs at low temperatures.
D.
It is independent of surface area.
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Solution
Chemisorption involves the formation of a chemical bond and is generally an irreversible process.
Correct Answer: B — It involves the formation of a chemical bond.
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Q. Which of the following statements is true regarding colligative properties?
A.
They depend on the identity of the solute
B.
They depend on the concentration of the solute
C.
They depend on the nature of the solvent
D.
They depend on the number of solute particles
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Solution
Colligative properties depend on the number of solute particles, not their identity.
Correct Answer: D — They depend on the number of solute particles
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Q. Which of the following statements is true regarding coordination compounds?
A.
They always have a fixed oxidation state.
B.
They can exhibit different colors.
C.
They cannot form isomers.
D.
They are always soluble in water.
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Solution
Coordination compounds can exhibit different colors due to the presence of different ligands and their ability to split d-orbitals.
Correct Answer: B — They can exhibit different colors.
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Q. Which of the following statements is true regarding dynamic equilibrium?
A.
The concentrations of reactants and products are equal
B.
The rate of the forward reaction equals the rate of the reverse reaction
C.
The reaction has stopped
D.
All reactions reach dynamic equilibrium
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Solution
Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction, not necessarily when concentrations are equal.
Correct Answer: B — The rate of the forward reaction equals the rate of the reverse reaction
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Q. Which of the following statements is true regarding electric field lines?
A.
They can cross each other
B.
They are always straight
C.
They point from positive to negative charges
D.
They are always circular
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Solution
Electric field lines point from positive to negative charges and never cross each other.
Correct Answer: C — They point from positive to negative charges
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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
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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
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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.
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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.
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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.
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Solution
The correct equation for Gibbs Free Energy is ΔG = ΔH - TΔS, which relates enthalpy, entropy, and temperature.
Correct Answer: B — ΔG = ΔH - TΔS.
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Q. Which of the following statements is true regarding gravitational force?
A.
It is a contact force
B.
It acts only on Earth
C.
It is always attractive
D.
It can be repulsive
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Solution
Gravitational force is always attractive, acting between any two masses.
Correct Answer: C — It is always attractive
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Q. Which of the following statements is true regarding gravitational potential energy?
A.
It is always positive
B.
It can be negative
C.
It is independent of height
D.
It is only defined for objects at rest
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Solution
Gravitational potential energy can be negative when an object is below a reference point, such as the Earth's surface.
Correct Answer: B — It can be negative
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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.
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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.
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Q. Which of the following statements is true regarding isotopes?
A.
They have the same number of protons
B.
They have different chemical properties
C.
They have different atomic numbers
D.
They have the same mass number
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Solution
Isotopes of an element have the same number of protons but different numbers of neutrons, leading to different mass numbers.
Correct Answer: A — They have the same number of protons
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Q. Which of the following statements is true regarding Lenz's law?
A.
It states that induced current flows in the same direction as the change in magnetic field.
B.
It states that induced current flows in the opposite direction to the change in magnetic field.
C.
It has no relation to electromagnetic induction.
D.
It only applies to static magnetic fields.
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Solution
Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux that produced it.
Correct Answer: B — It states that induced current flows in the opposite direction to the change in magnetic field.
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Q. Which of the following statements is true regarding magnetic field lines?
A.
They can cross each other
B.
They are always straight
C.
They form closed loops
D.
They originate from magnetic monopoles
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Solution
Magnetic field lines form closed loops, meaning they exit from the north pole and enter the south pole, and they do not cross each other.
Correct Answer: C — They form closed loops
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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
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Solution
The mesomeric effect is a permanent effect due to the delocalization of electrons.
Correct Answer: A — It is a permanent effect
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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.
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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.
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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
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Solution
Optical isomers, or enantiomers, rotate plane-polarized light in opposite directions.
Correct Answer: C — They rotate plane-polarized light in opposite directions
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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.
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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.
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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.
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Solution
Oxidizing agents are reduced in redox reactions.
Correct Answer: C — Oxidizing agents are reduced.
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Q. Which of the following statements is true regarding RMS speed?
A.
It is always greater than average speed.
B.
It is always less than average speed.
C.
It is equal to average speed.
D.
It depends on the gas type.
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Solution
RMS speed is always greater than average speed for a gas due to the nature of the calculations involved.
Correct Answer: A — It is always greater than average speed.
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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
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Solution
-I effect withdraws electron density, which can destabilize carbocations and stabilize carbanions.
Correct Answer: C — It withdraws electron density
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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
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Solution
The activation energy (Ea) of a reaction is always positive.
Correct Answer: A — It is always positive
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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
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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
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Q. Which of the following statements is true regarding the Biot-Savart Law?
A.
It applies only to straight conductors
B.
It can be used for any current distribution
C.
It is only valid for AC currents
D.
It does not consider the distance from the wire
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Solution
The Biot-Savart Law can be used for any current distribution, not just straight conductors.
Correct Answer: B — It can be used for any current distribution
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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.
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Solution
The boiling point of a liquid increases with increasing atmospheric pressure.
Correct Answer: B — It increases with increasing atmospheric pressure.
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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
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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
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