Q. In which of the following conditions does a gas deviate most from ideal behavior?
A.
High temperature and low pressure
B.
Low temperature and high pressure
C.
High temperature and high pressure
D.
Low temperature and low pressure
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Solution
A gas deviates most from ideal behavior at low temperatures and high pressures due to increased intermolecular forces.
Correct Answer:
B
— Low temperature and high pressure
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Q. In which of the following conditions does the entropy of a system increase? (2022)
A.
When a gas is compressed
B.
When a solid melts
C.
When a liquid freezes
D.
When a gas is cooled
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Solution
The entropy of a system increases when a solid melts into a liquid, as the disorder of the system increases.
Correct Answer:
B
— When a solid melts
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Q. In which of the following does external fertilization occur? (2019)
A.
Frogs
B.
Humans
C.
Birds
D.
Reptiles
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Solution
Frogs typically exhibit external fertilization, where eggs and sperm are released into the water.
Correct Answer:
A
— Frogs
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Q. In which of the following materials does heat transfer occur primarily through conduction?
A.
Metal
B.
Water
C.
Air
D.
Vacuum
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Solution
Heat transfer through conduction occurs primarily in solids, especially metals.
Correct Answer:
A
— Metal
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Q. In which of the following molecules does the molecular orbital configuration lead to paramagnetism?
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Solution
O2 is paramagnetic due to the presence of two unpaired electrons in its molecular orbitals.
Correct Answer:
B
— O2
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Q. In which of the following molecules does the molecular orbital configuration show unpaired electrons?
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Solution
O2 has two unpaired electrons in its π* orbitals, making it paramagnetic.
Correct Answer:
B
— O2
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Q. In which of the following molecules does the molecular orbital diagram show a paramagnetic behavior?
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Solution
O2 is paramagnetic due to the presence of two unpaired electrons in its molecular orbitals.
Correct Answer:
B
— O2
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Q. In which of the following molecules does the molecular orbital theory predict a paramagnetic behavior?
Show solution
Solution
O2 is paramagnetic due to the presence of two unpaired electrons in its molecular orbitals.
Correct Answer:
B
— O2
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Q. In which of the following molecules does the molecular orbital theory predict a triple bond?
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Solution
N2 has a triple bond, with a bond order of 3 according to molecular orbital theory.
Correct Answer:
A
— N2
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Q. In which of the following orbitals would an electron have the highest energy?
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Solution
The 3s orbital has the highest principal quantum number (n=3), indicating it has the highest energy.
Correct Answer:
D
— 3s
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Q. In which of the following organisms does binary fission occur? (2019)
A.
Yeast
B.
Amoeba
C.
Hydra
D.
Starfish
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Solution
Binary fission is a form of asexual reproduction commonly seen in unicellular organisms like Amoeba.
Correct Answer:
B
— Amoeba
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Q. In which of the following organisms does external fertilization occur? (2021)
A.
Frog
B.
Human
C.
Dog
D.
Cat
Show solution
Solution
Frogs exhibit external fertilization where eggs and sperm are released into the water.
Correct Answer:
A
— Frog
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Q. In which of the following organisms does external fertilization typically occur? (2019)
A.
Humans
B.
Frogs
C.
Birds
D.
Reptiles
Show solution
Solution
Frogs typically exhibit external fertilization, where eggs and sperm are released into the water.
Correct Answer:
B
— Frogs
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Q. In which of the following processes does heat transfer occur without any medium?
A.
Conduction
B.
Convection
C.
Radiation
D.
None of the above
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Solution
Radiation is the process of heat transfer that occurs without any medium.
Correct Answer:
C
— Radiation
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Q. In which of the following processes does the internal energy of a system remain constant?
A.
Isothermal process
B.
Adiabatic process
C.
Isobaric process
D.
Isochoric process
Show solution
Solution
In an isothermal process, the internal energy of an ideal gas remains constant.
Correct Answer:
A
— Isothermal process
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Q. In which of the following processes does the temperature of a gas increase?
A.
Isothermal expansion
B.
Adiabatic compression
C.
Isobaric expansion
D.
Isochoric cooling
Show solution
Solution
In adiabatic compression, the temperature of a gas increases due to work done on it.
Correct Answer:
B
— Adiabatic compression
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Q. In which of the following processes does the temperature of a substance remain constant?
A.
Heating
B.
Cooling
C.
Phase change
D.
Compression
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Solution
During a phase change, the temperature of a substance remains constant despite heat being added or removed.
Correct Answer:
C
— Phase change
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Q. In which of the following processes does the temperature of the system remain constant?
A.
Isothermal process
B.
Adiabatic process
C.
Isobaric process
D.
Isochoric process
Show solution
Solution
In an isothermal process, the temperature of the system remains constant.
Correct Answer:
A
— Isothermal process
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Q. In which of the following processes is adsorption utilized? (2023)
A.
Water purification
B.
Sublimation
C.
Distillation
D.
Filtration
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Solution
Adsorption is widely used in water purification processes to remove impurities.
Correct Answer:
A
— Water purification
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Q. In which of the following processes is the enthalpy change (ΔH) equal to the heat absorbed at constant pressure? (2019)
A.
Isothermal process
B.
Isochoric process
C.
Isobaric process
D.
Adiabatic process
Show solution
Solution
In an isobaric process, the enthalpy change (ΔH) is equal to the heat absorbed or released at constant pressure.
Correct Answer:
C
— Isobaric process
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Q. In which of the following processes is the enthalpy change equal to the heat absorbed by the system at constant pressure? (2019)
A.
Isothermal process
B.
Isochoric process
C.
Isobaric process
D.
Adiabatic process
Show solution
Solution
In an isobaric process, the enthalpy change is equal to the heat absorbed by the system at constant pressure.
Correct Answer:
C
— Isobaric process
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Q. In which of the following reactions is the enthalpy change likely to be the largest?
A.
Dissolving salt in water
B.
Combustion of gasoline
C.
Melting of ice
D.
Sublimation of dry ice
Show solution
Solution
The combustion of gasoline releases a large amount of energy, resulting in a large enthalpy change.
Correct Answer:
B
— Combustion of gasoline
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Q. In which of the following reactions is the entropy change expected to be negative?
A.
N2(g) + 3H2(g) → 2NH3(g)
B.
C(s) + O2(g) → CO2(g)
C.
2H2(g) + O2(g) → 2H2O(g)
D.
CaCO3(s) → CaO(s) + CO2(g)
Show solution
Solution
The reaction N2(g) + 3H2(g) → 2NH3(g) results in a decrease in the number of gas molecules, leading to a negative change in entropy.
Correct Answer:
A
— N2(g) + 3H2(g) → 2NH3(g)
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Q. In which of the following scenarios does a liquid exhibit the highest boiling point?
A.
High molecular weight and strong intermolecular forces
B.
Low molecular weight and weak intermolecular forces
C.
High molecular weight and weak intermolecular forces
D.
Low molecular weight and strong intermolecular forces
Show solution
Solution
A liquid with high molecular weight and strong intermolecular forces will have a higher boiling point.
Correct Answer:
A
— High molecular weight and strong intermolecular forces
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Q. In which of the following scenarios does a liquid exhibit the highest density?
A.
At its boiling point
B.
At its freezing point
C.
At room temperature
D.
At its critical point
Show solution
Solution
A liquid typically exhibits the highest density at room temperature, as it is not at the extremes of phase change.
Correct Answer:
D
— At its critical point
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Q. In which of the following scenarios does a material exhibit elastic behavior?
A.
When it returns to its original shape after removing the load
B.
When it permanently deforms
C.
When it breaks
D.
When it undergoes plastic deformation
Show solution
Solution
A material exhibits elastic behavior when it returns to its original shape after the load is removed.
Correct Answer:
A
— When it returns to its original shape after removing the load
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Q. In which of the following scenarios does a material exhibit plastic deformation?
A.
When the stress is below the yield point
B.
When the stress exceeds the yield point
C.
When the material is unloaded
D.
When the material is cooled
Show solution
Solution
Plastic deformation occurs when the stress exceeds the yield point of the material.
Correct Answer:
B
— When the stress exceeds the yield point
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Q. In which of the following scenarios does a satellite experience weightlessness?
A.
When it is stationary on the ground
B.
When it is in free fall
C.
When it is at rest in space
D.
When it is moving at constant speed
Show solution
Solution
A satellite experiences weightlessness when it is in free fall, as both the satellite and its occupants are accelerating towards the Earth at the same rate.
Correct Answer:
B
— When it is in free fall
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Q. In which of the following scenarios does conduction occur?
A.
Heating water in a pot
B.
Sun warming the Earth
C.
Wind blowing
D.
Ice melting in a drink
Show solution
Solution
Conduction occurs when heat is transferred through direct contact, such as heating water in a pot.
Correct Answer:
A
— Heating water in a pot
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Q. In which of the following scenarios does elastic deformation occur?
A.
A rubber band being stretched
B.
A metal rod being permanently bent
C.
A glass breaking
D.
A clay being molded
Show solution
Solution
Elastic deformation occurs when the rubber band is stretched and returns to its original shape.
Correct Answer:
A
— A rubber band being stretched
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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!
