Engineering & Architecture Admissions
Q. Which of the following statements about alkenes is true?
A.
They are saturated hydrocarbons.
B.
They can undergo polymerization.
C.
They do not react with electrophiles.
D.
They have a higher boiling point than alkanes.
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Solution
Alkenes can undergo polymerization due to the presence of a double bond.
Correct Answer: B — They can undergo polymerization.
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Q. Which of the following statements about alkynes is incorrect?
A.
They are unsaturated hydrocarbons.
B.
They contain at least one triple bond.
C.
They are more reactive than alkenes.
D.
They have a higher boiling point than alkenes.
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Solution
Alkynes are generally less reactive than alkenes due to the stability of the triple bond.
Correct Answer: C — They are more reactive than alkenes.
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Q. Which of the following statements about alkynes is true?
A.
They are less acidic than alkenes.
B.
They can undergo polymerization.
C.
They have a higher boiling point than alkenes.
D.
They are more stable than alkenes.
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Solution
Alkynes have a higher boiling point than alkenes due to stronger intermolecular forces.
Correct Answer: C — They have a higher boiling point than alkenes.
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Q. Which of the following statements about amines is incorrect?
A.
Amines are basic in nature.
B.
Amines can form salts with acids.
C.
Amines have higher boiling points than alcohols.
D.
Amines can act as nucleophiles.
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Solution
Amines generally have lower boiling points than alcohols due to the absence of hydrogen bonding in tertiary amines.
Correct Answer: C — Amines have higher boiling points than alcohols.
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Q. Which of the following statements about aromatic amines is true?
A.
They are more basic than aliphatic amines
B.
They are less basic than aliphatic amines
C.
They do not react with acids
D.
They are neutral compounds
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Solution
Aromatic amines are less basic than aliphatic amines due to resonance stabilization of the lone pair on nitrogen.
Correct Answer: B — They are less basic than aliphatic amines
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Q. Which of the following statements about aromatic compounds is true?
A.
They are always colorless
B.
They have a sweet smell
C.
They are non-toxic
D.
They can be carcinogenic
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Solution
Many aromatic compounds can be carcinogenic, such as benzene, which is known to be harmful to human health.
Correct Answer: D — They can be carcinogenic
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Q. Which of the following statements about buoyancy is true?
A.
Buoyant force acts downward
B.
Buoyant force is equal to the weight of the fluid displaced
C.
Buoyant force depends on the shape of the object
D.
Buoyant force is always equal to the weight of the object
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Solution
The buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.
Correct Answer: B — Buoyant force is equal to the weight of the fluid displaced
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Q. Which of the following statements about carboxylic acids is true?
A.
They are always soluble in water
B.
They have higher boiling points than alcohols
C.
They can form hydrogen bonds
D.
All of the above
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Solution
Carboxylic acids can form hydrogen bonds due to the presence of the -COOH group, which contributes to their higher boiling points compared to hydrocarbons.
Correct Answer: C — They can form hydrogen bonds
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Q. Which of the following statements about catalysts is true?
A.
They are consumed in the reaction
B.
They increase the activation energy
C.
They provide an alternative reaction pathway
D.
They change the equilibrium constant
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Solution
Catalysts provide an alternative reaction pathway with a lower activation energy, but they are not consumed in the reaction.
Correct Answer: C — They provide an alternative reaction pathway
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Q. Which of the following statements about circularly polarized light is true?
A.
It has no preferred direction of oscillation
B.
It oscillates in a single plane
C.
It can be converted to linearly polarized light
D.
It is always produced by reflection
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Solution
Circularly polarized light has no preferred direction of oscillation; the electric field vector rotates in a circular motion.
Correct Answer: A — It has no preferred direction of oscillation
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Q. Which of the following statements about colligative properties is true?
A.
They depend on the identity of the solute
B.
They depend on the number of solute particles
C.
They are independent of temperature
D.
They are only applicable to ionic compounds
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Solution
Colligative properties depend on the number of solute particles in a solution, not their identity.
Correct Answer: B — They depend on the number of solute particles
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Q. Which of the following statements about diffraction gratings is true?
A.
They can only produce first-order maxima
B.
They can produce multiple orders of maxima
C.
They do not produce any maxima
D.
They only work with monochromatic light
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Solution
Diffraction gratings can produce multiple orders of maxima due to the constructive interference of light waves.
Correct Answer: B — They can produce multiple orders of maxima
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Q. Which of the following statements about diffraction is true?
A.
Diffraction can occur with any type of wave
B.
Diffraction only occurs with sound waves
C.
Diffraction is only observed in light waves
D.
Diffraction is a phenomenon exclusive to electromagnetic waves
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Solution
Diffraction can occur with any type of wave, including sound, light, and water waves.
Correct Answer: A — Diffraction can occur with any type of wave
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Q. Which of the following statements about dynamic equilibrium is true?
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.
The system is at rest
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Solution
In dynamic equilibrium, the rates of the forward and reverse reactions are equal, but the concentrations of reactants and products may not be 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 about elastic potential energy stored in a stretched wire is true?
A.
It is proportional to the square of the extension
B.
It is proportional to the extension
C.
It is independent of the material
D.
It is always constant
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Solution
The elastic potential energy stored in a stretched wire is given by U = (1/2) * F * x, which is proportional to the square of the extension.
Correct Answer: A — It is proportional to the square of the extension
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Q. Which of the following statements about electric field lines is true?
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, indicating the direction of the electric field.
Correct Answer: C — They point from positive to negative charges
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Q. Which of the following statements about electromagnetic waves is true?
A.
They require a medium to propagate
B.
They travel at the speed of sound
C.
They are transverse waves
D.
They are longitudinal waves
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Solution
Electromagnetic waves are transverse waves that do not require a medium to propagate and travel at the speed of light in a vacuum.
Correct Answer: C — They are transverse waves
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Q. Which of the following statements about electrons is true?
A.
They have a positive charge
B.
They are found in the nucleus
C.
They have a negligible mass
D.
They are stationary
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Solution
Electrons have a negligible mass compared to protons and neutrons.
Correct Answer: C — They have a negligible mass
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Q. Which of the following statements about enthalpy is true?
A.
Enthalpy is an extensive property.
B.
Enthalpy is an intensive property.
C.
Enthalpy cannot be measured directly.
D.
Enthalpy is always positive.
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Solution
Enthalpy is an extensive property, meaning it depends on the amount of substance present.
Correct Answer: A — Enthalpy is an extensive property.
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Q. Which of the following statements about entropy is true?
A.
Entropy is a measure of disorder.
B.
Entropy decreases in spontaneous processes.
C.
Entropy is always constant.
D.
Entropy cannot be calculated.
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Solution
Entropy is a measure of disorder in a system.
Correct Answer: A — Entropy is a measure of disorder.
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Q. Which of the following statements about equilibrium constants is true?
A.
K is temperature dependent
B.
K is pressure dependent
C.
K is concentration dependent
D.
K is always equal to 1
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Solution
The equilibrium constant K is dependent on temperature; changing the temperature will change the value of K.
Correct Answer: A — K is temperature dependent
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Q. Which of the following statements about ethers is true?
A.
Ethers are more polar than alcohols
B.
Ethers have higher boiling points than alcohols
C.
Ethers are less reactive than alcohols
D.
Ethers can form hydrogen bonds with water
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Solution
Ethers are generally less reactive than alcohols due to the absence of a hydroxyl group.
Correct Answer: C — Ethers are less reactive than alcohols
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Q. Which of the following statements about fluids is true?
A.
Fluids can only flow in one direction
B.
Fluids have a definite shape
C.
Fluids can exert pressure in all directions
D.
Fluids are incompressible
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Solution
Fluids can exert pressure in all directions, which is a fundamental property of fluids.
Correct Answer: C — Fluids can exert pressure in all directions
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Q. Which of the following statements about geostationary satellites is true?
A.
They orbit the Earth in a polar orbit
B.
They have a period of 24 hours
C.
They are closer to the Earth than low Earth orbit satellites
D.
They can be used for global positioning
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Solution
Geostationary satellites have an orbital period equal to the Earth's rotation period, which is 24 hours.
Correct Answer: B — They have a period of 24 hours
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Q. Which of the following statements about gravitational potential energy (U) is true?
A.
U increases as two masses move closer together
B.
U decreases as two masses move closer together
C.
U is always positive
D.
U is independent of distance
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Solution
Gravitational potential energy decreases as two masses move closer together, as U = -G * (m1 * m2) / r.
Correct Answer: B — U decreases as two masses move closer together
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Q. Which of the following statements about gravitational potential energy is true?
A.
It is always positive.
B.
It can be negative.
C.
It is independent of the reference point.
D.
It increases with distance.
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Solution
Gravitational potential energy can be negative depending on the reference point chosen.
Correct Answer: B — It can be negative.
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Q. Which of the following statements about haloalkanes is true?
A.
They are polar compounds
B.
They are non-polar compounds
C.
They do not react with nucleophiles
D.
They are always solids
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Solution
Haloalkanes are polar compounds due to the electronegativity difference between carbon and halogen.
Correct Answer: A — They are polar compounds
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Q. Which of the following statements about ideal solutions is true?
A.
They obey Raoult's law at all concentrations
B.
They have a constant boiling point
C.
They have a constant density
D.
They do not exhibit colligative properties
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Solution
Ideal solutions obey Raoult's law at all concentrations, meaning their vapor pressures are proportional to the mole fractions.
Correct Answer: A — They obey Raoult's law at all concentrations
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Q. Which of the following statements about inductive effect is correct?
A.
It is a permanent effect
B.
It is a temporary effect
C.
It only affects alkenes
D.
It increases basicity
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Solution
Inductive effect is a permanent effect due to the electronegativity of atoms or groups.
Correct Answer: A — It is a permanent effect
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Q. Which of the following statements about isomerism is FALSE?
A.
Isomers have the same molecular formula.
B.
Isomers have different physical properties.
C.
Isomers have different chemical properties.
D.
Isomers cannot exist in the same physical state.
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Solution
Isomers can exist in the same physical state, such as liquid or solid.
Correct Answer: D — Isomers cannot exist in the same physical state.
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