Engineering & Architecture Admissions
Q. Which phenomenon explains the formation of a rainbow?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Interference
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Solution
The formation of a rainbow is primarily due to the refraction of light as it enters and exits water droplets in the atmosphere, along with reflection inside the droplets.
Correct Answer: B — Refraction
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Q. Which phenomenon explains the polarization of light by scattering?
A.
Refraction
B.
Reflection
C.
Diffraction
D.
Rayleigh scattering
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Solution
Rayleigh scattering is responsible for the polarization of light, especially in the atmosphere, as shorter wavelengths scatter more than longer wavelengths.
Correct Answer: D — Rayleigh scattering
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Q. Which phenomenon explains why a needle can float on water despite being denser?
A.
Buoyancy
B.
Surface tension
C.
Viscosity
D.
Capillarity
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Solution
Surface tension allows the needle to float on water, as it creates a 'skin' on the surface that can support the weight of the needle.
Correct Answer: B — Surface tension
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Q. Which phenomenon explains why a straw can draw liquid upwards?
A.
Capillary action
B.
Surface tension
C.
Viscosity
D.
Hydrostatic pressure
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Solution
Capillary action allows liquids to rise in narrow spaces, such as a straw, due to adhesive and cohesive forces.
Correct Answer: A — Capillary action
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Q. Which phenomenon is primarily responsible for the shape of small liquid droplets?
A.
Viscosity
B.
Surface tension
C.
Density
D.
Capillarity
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Solution
Surface tension causes small droplets to minimize their surface area, resulting in a spherical shape.
Correct Answer: B — Surface tension
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Q. Which phenomenon is responsible for the blue color of the sky?
A.
Refraction
B.
Reflection
C.
Scattering
D.
Polarization
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Solution
The blue color of the sky is due to Rayleigh scattering, which is a form of polarization.
Correct Answer: C — Scattering
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Q. Which phenomenon occurs when a wave passes from one medium to another and changes speed?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Interference
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Solution
Refraction occurs when a wave passes from one medium to another and changes speed, resulting in a change in direction.
Correct Answer: B — Refraction
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Q. Which polymer is commonly used in the production of plastic bottles?
A.
Polypropylene
B.
Polyethylene terephthalate
C.
Polystyrene
D.
Polyvinyl chloride
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Solution
Polyethylene terephthalate (PET) is commonly used in the production of plastic bottles.
Correct Answer: B — Polyethylene terephthalate
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Q. Which polymer is commonly used in the production of rubber?
A.
Polyethylene
B.
Natural rubber
C.
Polystyrene
D.
Polyvinyl chloride
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Solution
Natural rubber is a polymer that is widely used in the production of rubber products.
Correct Answer: B — Natural rubber
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Q. Which polymer is known for its high resistance to heat and chemicals?
A.
Polyethylene
B.
Teflon
C.
Nylon
D.
Acrylic
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Solution
Teflon is known for its high resistance to heat and chemicals.
Correct Answer: B — Teflon
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Q. Which principle explains why a ship floats on water?
A.
Archimedes' principle
B.
Bernoulli's principle
C.
Pascal's principle
D.
Newton's third law
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Solution
Archimedes' principle states that a body submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.
Correct Answer: A — Archimedes' principle
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Q. Which process involves a change in temperature due to heat transfer?
A.
Isothermal process
B.
Adiabatic process
C.
Isobaric process
D.
Isochoric process
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Solution
An isobaric process occurs at constant pressure and can involve a change in temperature due to heat transfer.
Correct Answer: C — Isobaric process
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Q. Which process involves a change in temperature without a change in heat content?
A.
Isothermal process
B.
Adiabatic process
C.
Isochoric process
D.
Isobaric process
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Solution
In an adiabatic process, there is no heat exchange with the surroundings, leading to a change in temperature.
Correct Answer: B — Adiabatic process
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Q. Which process involves a change in temperature without a change in phase?
A.
Melting
B.
Boiling
C.
Heating
D.
Condensation
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Solution
Heating involves a change in temperature without a change in phase.
Correct Answer: C — Heating
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Q. Which process involves the transfer of heat through the movement of fluids?
A.
Conduction
B.
Convection
C.
Radiation
D.
Insulation
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Solution
Convection is the process of heat transfer through the movement of fluids.
Correct Answer: B — Convection
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Q. Which property is NOT typical of elastomers?
A.
High elasticity
B.
Low tensile strength
C.
Good resilience
D.
Brittleness
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Solution
Brittleness is not a typical property of elastomers; they are known for their high elasticity and resilience.
Correct Answer: D — Brittleness
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Q. Which property of polymers is primarily affected by their molecular weight?
A.
Color
B.
Density
C.
Melting point
D.
Solubility
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Solution
The melting point of polymers is primarily affected by their molecular weight; higher molecular weight generally leads to higher melting points.
Correct Answer: C — Melting point
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Q. Which quantum number can have a value of 0?
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Solution
The azimuthal quantum number (l) can have a value of 0, which corresponds to an s orbital.
Correct Answer: B — l
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Q. Which quantum number describes the orientation of an orbital in space?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
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Solution
The magnetic quantum number (m_l) describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
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Q. Which quantum number describes the orientation of an orbital?
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
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Solution
The magnetic quantum number describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
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Q. Which quantum number describes the shape of an orbital?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
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Solution
The azimuthal quantum number (l) determines the shape of the orbital.
Correct Answer: B — Azimuthal quantum number (l)
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Q. Which quantum number determines the energy level of an electron in an atom?
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Solution
The principal quantum number n determines the energy level of an electron in an atom.
Correct Answer: A — n
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Q. Which quantum number determines the orientation of an orbital in space?
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Solution
The magnetic quantum number (m_l) determines the orientation of an orbital in space.
Correct Answer: C — m_l
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Q. Which quantum number determines the orientation of an orbital?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
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Solution
The magnetic quantum number (m_l) determines the orientation of an orbital.
Correct Answer: C — Magnetic quantum number (m_l)
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Q. Which quantum number determines the shape of an atomic orbital?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
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Solution
The azimuthal quantum number (l) determines the shape of the orbital.
Correct Answer: B — Azimuthal quantum number (l)
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Q. Which quantum number is associated with the orientation of an orbital?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m_l)
D.
Spin quantum number (m_s)
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Solution
The magnetic quantum number (m_l) describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number (m_l)
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Q. Which quantum number is not allowed to be negative?
A.
Principal quantum number (n)
B.
Azimuthal quantum number (l)
C.
Magnetic quantum number (m)
D.
Spin quantum number (s)
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Solution
The principal quantum number (n) cannot be negative; it must be a positive integer.
Correct Answer: A — Principal quantum number (n)
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Q. Which reaction involves the addition of water to an alkene?
A.
Hydrogenation
B.
Hydrolysis
C.
Hydration
D.
Dehydration
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Solution
The addition of water to an alkene is called hydration.
Correct Answer: C — Hydration
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Q. Which reaction is characteristic of alkenes?
A.
Hydrogenation
B.
Halogenation
C.
Hydrolysis
D.
Oxidation
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Solution
Alkenes readily undergo halogenation due to the presence of a double bond.
Correct Answer: B — Halogenation
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Q. Which reaction is characteristic of alkynes?
A.
Hydrogenation
B.
Halogenation
C.
Hydrohalogenation
D.
All of the above
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Solution
Alkynes can undergo hydrogenation, halogenation, and hydrohalogenation.
Correct Answer: D — All of the above
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