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.
Show solution
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 gravitational fields? (2022)
A.
Gravitational fields are always attractive
B.
Gravitational fields can be repulsive
C.
Gravitational fields are independent of mass
D.
Gravitational fields do not exist in space
Show solution
Solution
Gravitational fields are always attractive, pulling masses towards each other.
Correct Answer: A — Gravitational fields are always attractive
Learn More →
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
Show solution
Solution
Gravitational force is always attractive, acting between any two masses.
Correct Answer: C — It is always attractive
Learn More →
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
Show solution
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
Learn More →
Q. Which of the following statements is true regarding harmonic progressions?
A.
The sum of the terms is always constant.
B.
The product of the terms is always constant.
C.
The reciprocals of the terms form an arithmetic progression.
D.
The terms are always integers.
Show solution
Solution
In a harmonic progression, the reciprocals of the terms indeed form an arithmetic progression.
Correct Answer: C — The reciprocals of the terms form an arithmetic progression.
Learn More →
Q. Which of the following statements is true regarding ideal gases? (2023)
A.
They have no volume
B.
They attract each other
C.
They occupy no space
D.
They have mass
Show solution
Solution
Ideal gases are considered to have no volume and no intermolecular forces.
Correct Answer: A — They have no volume
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.
Show solution
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 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
Show solution
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
Learn More →
Q. Which of the following statements is true regarding laminar flow?
A.
It occurs at high velocities
B.
It is characterized by smooth and orderly fluid motion
C.
It has a high Reynolds number
D.
It is turbulent in nature
Show solution
Solution
Laminar flow is characterized by smooth and orderly fluid motion, typically occurring at low velocities.
Correct Answer: B — It is characterized by smooth and orderly fluid motion
Learn More →
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.
Show solution
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.
Learn More →
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
Show solution
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
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
Show solution
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 modular arithmetic?
A.
It is only applicable to integers.
B.
It can be used for real numbers.
C.
It is not useful in computer science.
D.
It is only used in cryptography.
Show solution
Solution
Modular arithmetic is primarily applicable to integers, making the first statement true.
Correct Answer: A — It is only applicable to integers.
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.
Show solution
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
Show solution
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.
Show solution
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.
Show solution
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 reduction? (2020)
A.
It involves the gain of electrons
B.
It involves the loss of electrons
C.
It always occurs with oxidation
D.
Both A and C are correct
Show solution
Solution
Reduction is defined as the gain of electrons, and it always occurs simultaneously with oxidation in redox reactions.
Correct Answer: D — Both A and C are correct
Learn More →
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.
Show solution
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.
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
Show solution
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
Show solution
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
Show solution
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 angles formed when two lines intersect?
A.
Vertical angles are always supplementary
B.
Adjacent angles are always equal
C.
Linear pairs are always complementary
D.
Vertical angles are always equal
Show solution
Solution
When two lines intersect, the angles opposite each other (vertical angles) are always equal. Therefore, the correct statement is that vertical angles are always equal.
Correct Answer: D — Vertical angles are always equal
Learn More →
Q. Which of the following statements is true regarding the Arrhenius equation? (2023)
A.
It relates temperature to the rate constant
B.
It is only applicable to zero-order reactions
C.
It does not include activation energy
D.
It is a linear equation
Show solution
Solution
The Arrhenius equation relates temperature to the rate constant and includes activation energy.
Correct Answer: A — It relates temperature to the rate constant
Learn More →
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
Show solution
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
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.
Show solution
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 boiling points of aldehydes and ketones? (2023)
A.
Aldehydes have higher boiling points than ketones
B.
Ketones have higher boiling points than aldehydes
C.
Both have the same boiling points
D.
None of the above
Show solution
Solution
Ketones generally have higher boiling points than aldehydes due to stronger dipole-dipole interactions.
Correct Answer: B — Ketones have higher boiling points than aldehydes
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
Show solution
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 [Ag(NH3)2]+? (2023)
A.
It is a tetrahedral complex.
B.
It is a square planar complex.
C.
It is a linear complex.
D.
It is an octahedral complex.
Show solution
Solution
[Ag(NH3)2]+ is a linear complex because silver (Ag) has a coordination number of 2 with two bidentate ligands.
Correct Answer: C — It is a linear 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
Show solution
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 →
Showing 20821 to 20850 of 21651 (722 Pages)