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. Which quantum number describes the orientation of an orbital? (2020) 2020
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Spin quantum number
Show solution
Solution
The magnetic quantum number describes the orientation of an orbital.
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)
Show solution
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)
Show solution
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)
Show solution
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)
Show solution
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)
Show solution
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 quantum number is not required to describe the electron in an atom? (2019)
A.
Principal quantum number
B.
Azimuthal quantum number
C.
Magnetic quantum number
D.
Color quantum number
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Solution
Color quantum number is not a valid quantum number for describing electrons in an atom.
Correct Answer:
D
— Color quantum number
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Q. Which quarter had the lowest sales according to the bar graph?
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Solution
Q3 had the lowest sales with only 200 units sold.
Correct Answer:
C
— Q3
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Q. Which quarter showed the highest overall sales across all products?
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Solution
Q2 showed the highest overall sales across all products, totaling 1500 units.
Correct Answer:
B
— Q2
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Q. Which quarter showed the least growth in sales compared to the previous quarter?
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Solution
Q4 showed the least growth with only a 5% increase compared to Q3.
Correct Answer:
D
— Q4
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Q. Which quarter showed the lowest overall sales across all products according to the table?
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Solution
Q1 showed the lowest overall sales across all products.
Correct Answer:
A
— Q1
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Q. Which quarter showed the lowest overall sales across all products?
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Solution
Q1 showed the lowest overall sales when comparing the totals from the table.
Correct Answer:
A
— Q1
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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 alcohols? (2020)
A.
Dehydration
B.
Hydrogenation
C.
Halogenation
D.
Oxidation
Show solution
Solution
Dehydration is a characteristic reaction of alcohols where they lose water to form alkenes.
Correct Answer:
A
— Dehydration
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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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Q. Which reaction is characteristic of carboxylic acids? (2021)
A.
Esterification
B.
Hydrogenation
C.
Halogenation
D.
Dehydration
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Solution
Esterification is a characteristic reaction of carboxylic acids, where they react with alcohols to form esters.
Correct Answer:
A
— Esterification
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Q. Which reaction is commonly used to convert alkynes to alkenes?
A.
Hydrogenation
B.
Halogenation
C.
Hydroboration
D.
Dehydrohalogenation
Show solution
Solution
Hydrogenation is used to convert alkynes to alkenes.
Correct Answer:
A
— Hydrogenation
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Q. Which reaction is used to convert alkenes to alkanes?
A.
Hydrogenation
B.
Halogenation
C.
Hydrolysis
D.
Dehydrogenation
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Solution
Hydrogenation is the process of adding hydrogen to alkenes to convert them into alkanes.
Correct Answer:
A
— Hydrogenation
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Q. Which reaction is used to prepare alkynes from alkenes?
A.
Hydrogenation
B.
Dehydrohalogenation
C.
Hydrohalogenation
D.
Halogenation
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Solution
Dehydrohalogenation of vicinal dihalides can be used to prepare alkynes from alkenes.
Correct Answer:
B
— Dehydrohalogenation
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Q. Which reaction is used to prepare amines from alkyl halides? (2020)
A.
Nitration
B.
Hydrogenation
C.
Nucleophilic substitution
D.
Electrophilic substitution
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Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions where the amine acts as a nucleophile.
Correct Answer:
C
— Nucleophilic substitution
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Q. Which reaction is used to prepare amines from alkyl halides? (2020) 2020
A.
Hydrogenation
B.
Nucleophilic substitution
C.
Electrophilic substitution
D.
Dehydrohalogenation
Show solution
Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions, where the halide is replaced by an amine group.
Correct Answer:
B
— Nucleophilic substitution
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Q. Which reaction is used to prepare amines from nitriles? (2020)
A.
Hydrogenation
B.
Reduction
C.
Alkylation
D.
Dehydration
Show solution
Solution
Nitriles can be converted to amines through reduction, typically using hydrogen in the presence of a catalyst.
Correct Answer:
B
— Reduction
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Q. Which reaction is used to prepare carboxylic acids from alcohols? (2020)
A.
Oxidation
B.
Reduction
C.
Hydrolysis
D.
Dehydration
Show solution
Solution
Oxidation of alcohols leads to the formation of carboxylic acids.
Correct Answer:
A
— Oxidation
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Q. Which reaction is used to prepare primary amines from alkyl halides? (2022)
A.
Reduction
B.
Hydrolysis
C.
Nucleophilic substitution
D.
Dehydrohalogenation
Show solution
Solution
Primary amines can be prepared from alkyl halides through nucleophilic substitution reactions with ammonia.
Correct Answer:
C
— Nucleophilic substitution
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Q. Which reading strategy involves creating mental images?
A.
Visualizing
B.
Summarizing
C.
Skimming
D.
Scanning
Show solution
Solution
Visualizing involves creating mental images of the content being read, which aids in comprehension.
Correct Answer:
A
— Visualizing
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Q. Which reagent can be used to convert a haloalkane into an alcohol?
A.
Sodium hydroxide
B.
Sodium chloride
C.
Sodium bromide
D.
Sodium acetate
Show solution
Solution
Sodium hydroxide (NaOH) can be used to perform nucleophilic substitution, converting haloalkanes into alcohols.
Correct Answer:
A
— Sodium hydroxide
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Q. Which reagent can be used to convert a haloalkane to an alcohol?
A.
Sodium hydroxide
B.
Sodium metal
C.
Hydrochloric acid
D.
Bromine
Show solution
Solution
Sodium hydroxide can be used to convert haloalkanes to alcohols through nucleophilic substitution.
Correct Answer:
A
— Sodium hydroxide
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