Q. What is the phase of the cell cycle where the cell grows and prepares for mitosis? (2020)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The G1 phase is the first stage of interphase where the cell grows and prepares for DNA replication.
Correct Answer:
A
— G1 phase
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Q. What is the phenomenon called when a changing magnetic field induces an electric current in a conductor?
A.
Electromagnetic induction
B.
Electrolysis
C.
Magnetic resonance
D.
Thermal conduction
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Solution
The phenomenon of inducing an electric current in a conductor due to a changing magnetic field is known as electromagnetic induction.
Correct Answer:
A
— Electromagnetic induction
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Q. What is the phenomenon called when a changing magnetic field induces an electromotive force (EMF) in a conductor?
A.
Electromagnetic induction
B.
Magnetic resonance
C.
Electrolysis
D.
Magnetization
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Solution
The phenomenon of inducing an EMF in a conductor due to a changing magnetic field is known as electromagnetic induction.
Correct Answer:
A
— Electromagnetic induction
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Q. What is the phenomenon called when a changing magnetic field induces an electromotive force (EMF) in a circuit?
A.
Electromagnetic induction
B.
Magnetic resonance
C.
Electrolysis
D.
Magnetization
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Solution
The phenomenon is known as electromagnetic induction, as described by Faraday's law.
Correct Answer:
A
— Electromagnetic induction
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Q. What is the phenomenon called when a conductor moves through a magnetic field and generates an electric current?
A.
Electromagnetic induction
B.
Magnetic hysteresis
C.
Electrostatic induction
D.
Magnetic flux
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Solution
This phenomenon is known as electromagnetic induction, where a changing magnetic field induces an electric current in a conductor.
Correct Answer:
A
— Electromagnetic induction
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Q. What is the phenomenon called when a liquid changes to gas at a temperature below its boiling point?
A.
Evaporation
B.
Condensation
C.
Sublimation
D.
Freezing
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Solution
Evaporation is the process where a liquid changes to gas at temperatures below its boiling point.
Correct Answer:
A
— Evaporation
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Q. What is the phenomenon called when a liquid changes to gas at temperatures below its boiling point?
A.
Evaporation
B.
Condensation
C.
Sublimation
D.
Vaporization
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Solution
Evaporation is the process where a liquid changes to gas at temperatures below its boiling point.
Correct Answer:
A
— Evaporation
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Q. What is the phenomenon called when a liquid rises in a narrow tube against gravity?
A.
Capillarity
B.
Viscosity
C.
Surface tension
D.
Hydrostatic pressure
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Solution
Capillarity is the phenomenon where a liquid rises in a narrow tube against gravity due to adhesive and cohesive forces.
Correct Answer:
A
— Capillarity
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Q. What is the phenomenon called when an electron transitions from a higher energy level to a lower energy level in an atom?
A.
Ionization
B.
Excitation
C.
Emission
D.
Absorption
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Solution
When an electron transitions from a higher energy level to a lower energy level, it releases energy in the form of a photon, a process known as emission.
Correct Answer:
C
— Emission
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Q. What is the phenomenon called when electrons are emitted from a metal surface when it is exposed to light?
A.
Photoelectric effect
B.
Compton effect
C.
Rayleigh scattering
D.
Black body radiation
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Solution
The emission of electrons from a metal surface when exposed to light is known as the photoelectric effect.
Correct Answer:
A
— Photoelectric effect
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Q. What is the phenomenon called when light bends as it passes from one medium to another? (2020)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
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Solution
Refraction is the bending of light as it passes from one medium to another due to a change in its speed.
Correct Answer:
B
— Refraction
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Q. What is the phenomenon called when light waves are restricted to vibrate in a single plane?
A.
Refraction
B.
Diffraction
C.
Polarization
D.
Interference
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Solution
The phenomenon of light waves being restricted to vibrate in a single plane is called polarization.
Correct Answer:
C
— Polarization
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Q. What is the phenomenon called when light waves bend around the edges of an obstacle?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Interference
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Solution
The bending of light waves around the edges of an obstacle is known as diffraction.
Correct Answer:
C
— Diffraction
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Q. What is the phenomenon called when one gene affects the expression of another gene? (2022)
A.
Epistasis
B.
Pleiotropy
C.
Codominance
D.
Incomplete dominance
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Solution
The phenomenon where one gene affects the expression of another gene is called epistasis.
Correct Answer:
A
— Epistasis
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Q. What is the phenomenon called when sound waves bend around obstacles?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Interference
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Solution
The bending of sound waves around obstacles is known as diffraction.
Correct Answer:
C
— Diffraction
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Q. What is the phenomenon called when sound waves bounce off a surface? (2021)
A.
Refraction
B.
Reflection
C.
Diffraction
D.
Interference
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Solution
The bouncing back of sound waves from a surface is called reflection.
Correct Answer:
B
— Reflection
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Q. What is the phenomenon of bending of light called? (2023)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
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Solution
The bending of light as it passes from one medium to another is called refraction.
Correct Answer:
B
— Refraction
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Q. What is the phenomenon of bending of light when it passes from one medium to another called? (2015)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
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Solution
The bending of light when it passes from one medium to another is called refraction.
Correct Answer:
B
— Refraction
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Q. What is the phenomenon of diffraction primarily associated with?
A.
Reflection of light
B.
Bending of waves around obstacles
C.
Interference of waves
D.
Polarization of light
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Solution
Diffraction is the bending of waves around obstacles and the spreading of waves when they pass through small openings.
Correct Answer:
B
— Bending of waves around obstacles
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Q. What is the phenomenon of diffraction primarily responsible for?
A.
Bending of light around obstacles
B.
Reflection of light
C.
Refraction of light
D.
Polarization of light
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Solution
Diffraction is the bending of waves around obstacles and the spreading of waves when they pass through small openings.
Correct Answer:
A
— Bending of light around obstacles
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Q. What is the phenomenon of electromagnetic induction?
A.
The generation of electric current by a changing magnetic field
B.
The generation of magnetic field by a changing electric current
C.
The interaction between electric and magnetic fields
D.
The conversion of mechanical energy into electrical energy
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Solution
Electromagnetic induction refers to the generation of electric current in a conductor due to a changing magnetic field.
Correct Answer:
A
— The generation of electric current by a changing magnetic field
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Q. What is the phenomenon of polarization in light?
A.
The splitting of light into different colors
B.
The alignment of light waves in a particular direction
C.
The reflection of light off a surface
D.
The bending of light as it passes through a medium
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Solution
Polarization refers to the orientation of the oscillations of light waves in a particular direction.
Correct Answer:
B
— The alignment of light waves in a particular direction
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Q. What is the photoelectric effect primarily used for in technology?
A.
Solar panels
B.
LEDs
C.
Lasers
D.
Television screens
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Solution
The photoelectric effect is primarily used in solar panels to convert light energy into electrical energy.
Correct Answer:
A
— Solar panels
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Q. What is the photoelectric effect?
A.
Emission of electrons from a metal surface when light shines on it
B.
Absorption of light by a metal surface
C.
Reflection of light from a metal surface
D.
Transmission of light through a metal surface
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Solution
The photoelectric effect is the phenomenon where electrons are emitted from a metal surface when it is exposed to light of sufficient frequency.
Correct Answer:
A
— Emission of electrons from a metal surface when light shines on it
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Q. What is the pKa of acetic acid?
A.
4.76
B.
5.76
C.
3.76
D.
6.76
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Solution
The pKa of acetic acid is approximately 4.76.
Correct Answer:
A
— 4.76
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Q. What is the pKa range of most carboxylic acids?
A.
0-1
B.
4-5
C.
8-9
D.
10-11
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Solution
Most carboxylic acids have a pKa range of about 4-5.
Correct Answer:
B
— 4-5
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Q. What is the pKa value of acetic acid?
A.
4.76
B.
7.00
C.
9.25
D.
2.00
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Solution
The pKa value of acetic acid is approximately 4.76.
Correct Answer:
A
— 4.76
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Q. What is the pKb value of a strong base?
A.
Less than 0
B.
Equal to 0
C.
Greater than 0
D.
Equal to 14
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Solution
A strong base has a pKb value less than 0, indicating high basicity.
Correct Answer:
A
— Less than 0
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Q. What is the pKb value of a weak base like aniline? (2020)
A.
Less than 5
B.
Around 9
C.
Around 14
D.
Greater than 15
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Solution
Aniline has a pKb value around 9, indicating it is a weak base.
Correct Answer:
B
— Around 9
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Q. What is the pKb value of a weak base like methylamine?
A.
Less than 7
B.
Equal to 7
C.
Greater than 7
D.
Undefined
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Solution
Methylamine is a weak base, so its pKb value is less than 7.
Correct Answer:
A
— Less than 7
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