Q. What is the binary equivalent of the decimal number 13?
A.
1010
B.
1100
C.
1101
D.
1110
Show solution
Solution
The binary equivalent of 13 is 1101.
Correct Answer:
C
— 1101
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Q. What is the binary equivalent of the hexadecimal number 'A3'?
A.
10100011
B.
11010011
C.
10011011
D.
10111011
Show solution
Solution
The hexadecimal number 'A3' converts to binary as 10100011.
Correct Answer:
A
— 10100011
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Q. What is the binding energy of a nucleus?
A.
Energy required to remove a nucleon
B.
Energy released during nuclear fusion
C.
Energy required to split the nucleus
D.
Energy required to form the nucleus from its constituents
Show solution
Solution
The binding energy of a nucleus is the energy required to form the nucleus from its constituent protons and neutrons.
Correct Answer:
D
— Energy required to form the nucleus from its constituents
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Q. What is the binding energy per nucleon for a stable nucleus?
A.
Less than 1 MeV
B.
About 8 MeV
C.
More than 10 MeV
D.
Zero
Show solution
Solution
Stable nuclei typically have a binding energy per nucleon around 8 MeV.
Correct Answer:
B
— About 8 MeV
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Q. What is the boiling point elevation for a solution with 0.5 moles of a non-volatile solute in 1 kg of water? (Kb for water = 0.512 °C kg/mol) (2022)
A.
0.256 °C
B.
0.512 °C
C.
1.024 °C
D.
0.128 °C
Show solution
Solution
Boiling point elevation (ΔTb) = Kb * m = 0.512 °C kg/mol * 0.5 mol/kg = 0.256 °C.
Correct Answer:
A
— 0.256 °C
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Q. What is the boiling point elevation of a solution containing 1 mol of NaCl in 1 kg of water? (K_b for water = 0.512 °C kg/mol)
A.
0.512 °C
B.
1.024 °C
C.
1.536 °C
D.
2.048 °C
Show solution
Solution
Boiling point elevation = i * K_b * m = 2 * 0.512 * 1 = 1.024 °C (i = 2 for NaCl)
Correct Answer:
B
— 1.024 °C
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Q. What is the boiling point of a liquid?
A.
The temperature at which vapor pressure equals atmospheric pressure
B.
The temperature at which a liquid freezes
C.
The temperature at which a liquid evaporates
D.
The temperature at which a liquid condenses
Show solution
Solution
The boiling point is defined as the temperature at which the vapor pressure of a liquid equals the atmospheric pressure.
Correct Answer:
A
— The temperature at which vapor pressure equals atmospheric pressure
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Q. What is the boiling point of a solution containing 0.5 mol of KCl in 1 kg of water? (K_b for water = 0.512 °C kg/mol)
A.
1.024 °C
B.
0.512 °C
C.
1.536 °C
D.
2.048 °C
Show solution
Solution
Boiling point elevation = i * K_b * m = 2 * 0.512 * 0.5 = 0.512 °C; Boiling point = 100 + 0.512 = 100.512 °C
Correct Answer:
C
— 1.536 °C
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Q. What is the boiling point of water at sea level in Celsius?
A.
100°C
B.
90°C
C.
80°C
D.
110°C
Show solution
Solution
The boiling point of water at sea level is 100°C.
Correct Answer:
A
— 100°C
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Q. What is the boiling point of water at sea level? (2023)
A.
0°C
B.
50°C
C.
100°C
D.
150°C
Show solution
Solution
The boiling point of water at sea level is 100°C.
Correct Answer:
C
— 100°C
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Q. What is the boiling point of water at standard atmospheric pressure?
A.
100°C
B.
0°C
C.
50°C
D.
150°C
Show solution
Solution
The boiling point of water at standard atmospheric pressure is 100°C.
Correct Answer:
A
— 100°C
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Q. What is the boiling point trend among alcohols, ethers, and alkanes?
A.
Alcohols > Ethers > Alkanes
B.
Ethers > Alcohols > Alkanes
C.
Alkanes > Ethers > Alcohols
D.
All have the same boiling point
Show solution
Solution
Alcohols have higher boiling points than ethers and alkanes due to hydrogen bonding.
Correct Answer:
A
— Alcohols > Ethers > Alkanes
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Q. What is the boiling point trend among alcohols? (2020) 2020
A.
Decreases with molecular weight
B.
Increases with molecular weight
C.
Remains constant
D.
Increases with branching
Show solution
Solution
The boiling point of alcohols increases with molecular weight due to stronger hydrogen bonding.
Correct Answer:
B
— Increases with molecular weight
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Q. What is the boiling point trend among amines? (2020)
A.
Amines have lower boiling points than alkanes
B.
Amines have higher boiling points than alcohols
C.
Boiling points increase with molecular weight
D.
All of the above
Show solution
Solution
All of the above statements are true regarding the boiling point trends of amines.
Correct Answer:
D
— All of the above
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Q. What is the boiling point trend among primary, secondary, and tertiary amines?
A.
Primary > Secondary > Tertiary
B.
Tertiary > Secondary > Primary
C.
Secondary > Primary > Tertiary
D.
All have the same boiling point
Show solution
Solution
Primary amines have higher boiling points than secondary and tertiary amines due to stronger hydrogen bonding.
Correct Answer:
A
— Primary > Secondary > Tertiary
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Q. What is the boiling point trend of alcohols compared to alkanes?
A.
Higher
B.
Lower
C.
Same
D.
Varies
Show solution
Solution
Alcohols have higher boiling points than alkanes due to hydrogen bonding.
Correct Answer:
A
— Higher
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Q. What is the boiling point trend of amines compared to alkanes?
A.
Higher
B.
Lower
C.
Same
D.
Varies
Show solution
Solution
Amines have higher boiling points than alkanes due to hydrogen bonding.
Correct Answer:
A
— Higher
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Q. What is the boiling point trend of carboxylic acids compared to alcohols?
A.
Higher
B.
Lower
C.
Same
D.
Depends on molecular weight
Show solution
Solution
Carboxylic acids have higher boiling points than alcohols due to stronger hydrogen bonding.
Correct Answer:
A
— Higher
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Q. What is the boiling point trend of primary, secondary, and tertiary amines?
A.
Primary > Secondary > Tertiary
B.
Tertiary > Secondary > Primary
C.
Secondary > Primary > Tertiary
D.
All have the same boiling point
Show solution
Solution
Primary amines have higher boiling points due to stronger hydrogen bonding compared to secondary and tertiary amines.
Correct Answer:
A
— Primary > Secondary > Tertiary
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Q. What is the bond angle around the carbon atoms in an alkyne?
A.
120 degrees
B.
180 degrees
C.
109.5 degrees
D.
90 degrees
Show solution
Solution
The bond angle around the carbon atoms in an alkyne is approximately 180 degrees due to linear geometry.
Correct Answer:
B
— 180 degrees
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Q. What is the bond angle in a methane (CH4) molecule?
A.
90 degrees
B.
109.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
In methane, the bond angle is approximately 109.5 degrees due to its tetrahedral geometry.
Correct Answer:
B
— 109.5 degrees
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Q. What is the bond angle in a methane (CH4) molecule? (2023) 2023
A.
90 degrees
B.
109.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
The bond angle in methane (CH4) is approximately 109.5 degrees due to its tetrahedral geometry.
Correct Answer:
B
— 109.5 degrees
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Q. What is the bond angle in a tetrahedral molecule?
A.
90 degrees
B.
120 degrees
C.
109.5 degrees
D.
180 degrees
Show solution
Solution
In a tetrahedral geometry, the bond angles are approximately 109.5 degrees.
Correct Answer:
C
— 109.5 degrees
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Q. What is the bond angle in a trigonal planar molecule?
A.
120 degrees
B.
109.5 degrees
C.
180 degrees
D.
90 degrees
Show solution
Solution
In a trigonal planar geometry, the bond angles are 120 degrees.
Correct Answer:
A
— 120 degrees
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Q. What is the bond angle in a water molecule (H2O) according to VSEPR theory?
A.
120 degrees
B.
109.5 degrees
C.
104.5 degrees
D.
90 degrees
Show solution
Solution
The bond angle in H2O is approximately 104.5 degrees due to the two lone pairs on oxygen.
Correct Answer:
C
— 104.5 degrees
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Q. What is the bond angle in a water molecule (H2O)?
A.
120 degrees
B.
109.5 degrees
C.
104.5 degrees
D.
180 degrees
Show solution
Solution
The bond angle in H2O is approximately 104.5 degrees due to the two lone pairs on oxygen.
Correct Answer:
C
— 104.5 degrees
Learn More →
Q. What is the bond angle in the water molecule (H2O)? (2023)
A.
90 degrees
B.
104.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
The bond angle in a water molecule is approximately 104.5 degrees due to the bent shape caused by lone pairs on oxygen.
Correct Answer:
B
— 104.5 degrees
Learn More →
Q. What is the bond angle in water (H2O) due to the presence of hydrogen? (2023)
A.
90 degrees
B.
104.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
The bond angle in water is approximately 104.5 degrees due to the bent shape of the molecule.
Correct Answer:
B
— 104.5 degrees
Learn More →
Q. What is the bond angle in water (H2O) due to the presence of lone pairs on oxygen? (2019)
A.
104.5°
B.
109.5°
C.
120°
D.
90°
Show solution
Solution
The bond angle in water is approximately 104.5° due to the repulsion between the lone pairs on the oxygen atom.
Correct Answer:
A
— 104.5°
Learn More →
Q. What is the bond angle in water (H2O)?
A.
90 degrees
B.
104.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
The bond angle in water (H2O) is approximately 104.5 degrees.
Correct Answer:
B
— 104.5 degrees
Learn More →
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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!
