Major Competitive Exams MCQ & Objective Questions
Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.
What You Will Practise Here
Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams
Exam Relevance
The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.
Common Mistakes Students Make
Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam
FAQs
Question: How can I improve my performance in Major Competitive Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Question: What types of questions should I focus on for these exams?Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.
Question: Are there specific strategies for tackling objective questions?Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.
Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!
Q. What is the effect of increasing the resistance in a series RLC circuit on the Q factor?
A.
Increases Q factor
B.
Decreases Q factor
C.
No effect
D.
Doubles Q factor
Show solution
Solution
Increasing resistance decreases the Q factor, which is defined as Q = ωL/R.
Correct Answer:
B
— Decreases Q factor
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Q. What is the effect of increasing the resistance in an AC circuit on the overall current?
A.
Increases current
B.
Decreases current
C.
No effect
D.
Doubles current
Show solution
Solution
According to Ohm's law, increasing resistance in an AC circuit decreases the overall current.
Correct Answer:
B
— Decreases current
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Q. What is the effect of increasing the resistance in the circuit of a potentiometer?
A.
Increases the current
B.
Decreases the current
C.
No effect on current
D.
Increases the emf
Show solution
Solution
Increasing the resistance in the circuit decreases the current according to Ohm's law.
Correct Answer:
B
— Decreases the current
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Q. What is the effect of increasing the resistance of the potentiometer wire on the potential gradient?
A.
It increases the potential gradient
B.
It decreases the potential gradient
C.
It has no effect
D.
It depends on the voltage applied
Show solution
Solution
Increasing the resistance of the potentiometer wire while keeping the voltage constant decreases the current, which in turn decreases the potential gradient.
Correct Answer:
B
— It decreases the potential gradient
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Q. What is the effect of increasing the size of the halogen atom on the bond strength of haloalkanes? (2021)
A.
Increases bond strength
B.
Decreases bond strength
C.
No effect
D.
Increases reactivity
Show solution
Solution
As the size of the halogen atom increases, the bond length increases, leading to a decrease in bond strength.
Correct Answer:
B
— Decreases bond strength
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Q. What is the effect of increasing the size of the halogen atom on the reactivity of haloalkanes?
A.
Increases reactivity
B.
Decreases reactivity
C.
No effect
D.
Depends on the solvent
Show solution
Solution
Increasing the size of the halogen atom generally increases the reactivity of haloalkanes due to the weaker C-X bond.
Correct Answer:
A
— Increases reactivity
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Q. What is the effect of increasing the size of the halogen in haloalkanes on the bond strength?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Varies randomly
Show solution
Solution
As the size of the halogen increases, the bond strength decreases due to the longer bond length and weaker overlap.
Correct Answer:
B
— Decreases
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Q. What is the effect of increasing the size of the halogen in haloalkanes on the reactivity? (2023)
A.
Increases reactivity
B.
Decreases reactivity
C.
No effect
D.
Reactivity depends on the solvent
Show solution
Solution
Increasing the size of the halogen decreases the bond strength, thus increasing the reactivity of haloalkanes in nucleophilic substitution.
Correct Answer:
A
— Increases reactivity
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Q. What is the effect of increasing the slit width in a double-slit experiment on the interference pattern?
A.
Fringe width increases
B.
Fringe width decreases
C.
Fringe visibility increases
D.
Fringe visibility decreases
Show solution
Solution
Increasing the slit width reduces the coherence of the light waves, leading to decreased fringe visibility.
Correct Answer:
D
— Fringe visibility decreases
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Q. What is the effect of increasing the slit width in a single-slit diffraction experiment? (2021)
A.
Fringe width increases
B.
Fringe width decreases
C.
No effect on fringe width
D.
Fringe pattern disappears
Show solution
Solution
Increasing the slit width decreases the fringe width because the angle of diffraction decreases.
Correct Answer:
B
— Fringe width decreases
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Q. What is the effect of increasing the slit width in single-slit diffraction?
A.
Increases the width of the central maximum
B.
Decreases the width of the central maximum
C.
No effect on the central maximum
D.
Increases the intensity of the central maximum
Show solution
Solution
Increasing the slit width decreases the width of the central maximum due to the diffraction pattern becoming narrower.
Correct Answer:
B
— Decreases the width of the central maximum
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Q. What is the effect of increasing the speed of a charged particle moving in a magnetic field?
A.
Increases the magnetic force
B.
Decreases the magnetic force
C.
No effect on the magnetic force
D.
Reverses the direction of the force
Show solution
Solution
The magnetic force on a charged particle is proportional to its speed; increasing the speed increases the magnetic force.
Correct Answer:
A
— Increases the magnetic force
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Q. What is the effect of increasing the speed of a conductor moving through a magnetic field on the induced EMF?
A.
Increases the induced EMF
B.
Decreases the induced EMF
C.
No effect on the induced EMF
D.
Induced EMF becomes zero
Show solution
Solution
According to Faraday's law, the induced EMF is directly proportional to the rate of change of magnetic flux, which increases with speed.
Correct Answer:
A
— Increases the induced EMF
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Q. What is the effect of increasing the speed of a magnet moving through a coil?
A.
Induced current decreases
B.
Induced current increases
C.
No change in induced current
D.
Induced current becomes zero
Show solution
Solution
Increasing the speed of the magnet increases the rate of change of magnetic flux through the coil, which increases the induced current according to Faraday's law.
Correct Answer:
B
— Induced current increases
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Q. What is the effect of increasing the steric hindrance on the reactivity of aldehydes and ketones?
A.
Increases reactivity
B.
Decreases reactivity
C.
No effect
D.
Reactivity depends on solvent
Show solution
Solution
Increasing steric hindrance decreases the reactivity of ketones compared to aldehydes.
Correct Answer:
B
— Decreases reactivity
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Q. What is the effect of increasing the surface area of an object on its rate of heat transfer by radiation?
A.
Decreases
B.
Increases
C.
Remains constant
D.
Becomes zero
Show solution
Solution
Increasing the surface area of an object increases the rate of heat transfer by radiation, as more surface is available for emitting energy.
Correct Answer:
B
— Increases
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Q. What is the effect of increasing the surface area of an object on its rate of heat transfer?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on the material
Show solution
Solution
Increasing the surface area of an object increases the rate of heat transfer, as more area is available for heat exchange.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the surface charge density on the electric field of a charged plane sheet?
A.
Increases
B.
Decreases
C.
No effect
D.
Becomes zero
Show solution
Solution
The electric field due to a charged plane sheet is directly proportional to the surface charge density; increasing σ increases E.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the surface roughness on the coefficient of friction?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on the material
Show solution
Solution
Increasing surface roughness generally increases the coefficient of friction due to greater interlocking between the surfaces.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the temperature of a conductor on its resistance? (2019)
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Generally, the resistance of a conductor increases with an increase in temperature.
Correct Answer:
B
— Resistance increases
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Q. What is the effect of increasing the temperature of a gas at constant volume?
A.
Pressure decreases
B.
Pressure increases
C.
Volume increases
D.
Density increases
Show solution
Solution
Increasing the temperature of a gas at constant volume results in an increase in pressure, according to Gay-Lussac's law.
Correct Answer:
B
— Pressure increases
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Q. What is the effect of increasing the temperature of a gas on its pressure, assuming volume is constant?
A.
Pressure decreases
B.
Pressure increases
C.
Pressure remains constant
D.
Pressure becomes zero
Show solution
Solution
Increasing the temperature of a gas at constant volume increases the pressure, as per Gay-Lussac's law.
Correct Answer:
B
— Pressure increases
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Q. What is the effect of increasing the temperature of a gas on the speed of sound in that gas?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on pressure
Show solution
Solution
The speed of sound in a gas increases with an increase in temperature.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the temperature on the average speed of gas molecules?
A.
Average speed decreases
B.
Average speed remains constant
C.
Average speed increases
D.
Average speed becomes zero
Show solution
Solution
Increasing the temperature increases the average kinetic energy of gas molecules, which in turn increases their average speed.
Correct Answer:
C
— Average speed increases
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Q. What is the effect of increasing the temperature on the density of most liquids?
A.
Increases density
B.
Decreases density
C.
No effect
D.
Depends on the liquid
Show solution
Solution
For most liquids, increasing the temperature decreases the density as the liquid expands.
Correct Answer:
B
— Decreases density
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Q. What is the effect of increasing the temperature on the distribution of molecular speeds in a gas?
A.
The distribution becomes narrower
B.
The distribution becomes wider
C.
The distribution remains unchanged
D.
The average speed decreases
Show solution
Solution
Increasing the temperature increases the average kinetic energy of the molecules, resulting in a wider distribution of molecular speeds.
Correct Answer:
B
— The distribution becomes wider
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Q. What is the effect of increasing the temperature on the equilibrium constant Kc for an endothermic reaction? (2023)
A.
Kc decreases
B.
Kc increases
C.
Kc remains constant
D.
Kc becomes zero
Show solution
Solution
For an endothermic reaction, increasing the temperature shifts the equilibrium to the right, thus increasing the value of Kc.
Correct Answer:
B
— Kc increases
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Q. What is the effect of increasing the temperature on the equilibrium constant of an exothermic reaction?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on the reaction
Show solution
Solution
Increasing the temperature of an exothermic reaction decreases the equilibrium constant.
Correct Answer:
B
— Decreases
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Q. What is the effect of increasing the temperature on the refractive index of a medium?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on the medium
Show solution
Solution
Generally, as temperature increases, the refractive index of a medium decreases due to reduced density.
Correct Answer:
B
— Decreases
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Q. What is the effect of increasing the temperature on the resistance of a conductor?
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Increasing the temperature of a conductor generally increases its resistance due to increased atomic vibrations.
Correct Answer:
B
— Resistance increases
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