JEE Main MCQ & Objective Questions
The JEE Main exam is a crucial step for students aspiring to enter prestigious engineering colleges in India. It tests not only knowledge but also the ability to apply concepts effectively. Practicing MCQs and objective questions is essential for scoring better, as it helps in familiarizing students with the exam pattern and enhances their problem-solving skills. Engaging with practice questions allows students to identify important questions and strengthen their exam preparation.
What You Will Practise Here
Fundamental concepts of Physics, Chemistry, and Mathematics
Key formulas and their applications in problem-solving
Important definitions and theories relevant to JEE Main
Diagrams and graphical representations for better understanding
Numerical problems and their step-by-step solutions
Previous years' JEE Main questions for real exam experience
Time management strategies while solving MCQs
Exam Relevance
The topics covered in JEE Main are not only significant for the JEE exam but also appear in various CBSE and State Board examinations. Many concepts are shared with the NEET syllabus, making them relevant across multiple competitive exams. Common question patterns include conceptual applications, numerical problems, and theoretical questions that assess a student's understanding of core subjects.
Common Mistakes Students Make
Misinterpreting the question stem, leading to incorrect answers
Neglecting units in numerical problems, which can change the outcome
Overlooking negative marking and not managing time effectively
Relying too heavily on rote memorization instead of understanding concepts
Failing to review and analyze mistakes from practice tests
FAQs
Question: How can I improve my speed in solving JEE Main MCQ questions?Answer: Regular practice with timed quizzes and focusing on shortcuts can significantly enhance your speed.
Question: Are the JEE Main objective questions similar to previous years' papers?Answer: Yes, many questions are based on previous years' patterns, so practicing them can be beneficial.
Question: What is the best way to approach JEE Main practice questions?Answer: Start with understanding the concepts, then attempt practice questions, and finally review your answers to learn from mistakes.
Now is the time to take charge of your preparation! Dive into solving JEE Main MCQs and practice questions to test your understanding and boost your confidence for the exam.
Q. Which of the following elements has a half-filled p subshell?
A.
Boron
B.
Carbon
C.
Nitrogen
D.
Oxygen
Show solution
Solution
Nitrogen has the electronic configuration 1s2 2s2 2p3, which means it has a half-filled p subshell.
Correct Answer:
C
— Nitrogen
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Q. Which of the following elements has an incomplete d subshell?
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Solution
Chromium (Cr) has an electronic configuration of [Ar] 4s1 3d5, which means it has an incomplete d subshell.
Correct Answer:
D
— Cr
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Q. Which of the following elements has the electronic configuration 1s2 2s2 2p6 3s2 3p6 4s2?
Show solution
Solution
Calcium (Ca) has an atomic number of 20, and its electronic configuration is 1s2 2s2 2p6 3s2 3p6 4s2.
Correct Answer:
A
— Ca
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Q. Which of the following elements has the electronic configuration ending in 4p5?
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Solution
Bromine (Br) has the electronic configuration ending in 4p5, corresponding to atomic number 35.
Correct Answer:
A
— Br
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Q. Which of the following elements has the electronic configuration [Kr] 5s2 4d10 5p5?
A.
Iodine
B.
Bromine
C.
Astatine
D.
Tellurium
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Solution
The element with the configuration [Kr] 5s2 4d10 5p5 is Astatine (At), which has atomic number 85.
Correct Answer:
C
— Astatine
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Q. Which of the following elements has the electronic configuration [Kr] 5s2?
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Solution
Strontium (Sr) has 38 electrons, and its electronic configuration is [Kr] 5s2.
Correct Answer:
A
— Sr
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Q. Which of the following elements has the electronic configuration [Ne] 3s2 3p1?
A.
Aluminum
B.
Silicon
C.
Phosphorus
D.
Magnesium
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Solution
The electronic configuration [Ne] 3s2 3p1 corresponds to Aluminum.
Correct Answer:
A
— Aluminum
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Q. Which of the following elements has the electronic configuration [Ne] 3s2?
Show solution
Solution
Magnesium (Mg) has 12 electrons, and its electronic configuration is [Ne] 3s2.
Correct Answer:
A
— Mg
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Q. Which of the following elements has the electronic configuration [Ne]3s²3p⁵?
A.
Chlorine
B.
Bromine
C.
Fluorine
D.
Iodine
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Solution
The electronic configuration [Ne]3s²3p⁵ corresponds to Bromine.
Correct Answer:
B
— Bromine
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Q. Which of the following elements has the electronic configuration [Xe] 6s2 4f14 5d10?
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Solution
Mercury (Hg) has an atomic number of 80, and its electronic configuration is [Xe] 6s2 4f14 5d10.
Correct Answer:
B
— Hg
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Q. Which of the following elements has the electronic configuration [Xe] 6s2?
A.
Radon
B.
Barium
C.
Lead
D.
Polonium
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Solution
The element with the configuration [Xe] 6s2 is Barium.
Correct Answer:
B
— Barium
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Q. Which of the following elements has the highest atomic number?
A.
Gold
B.
Platinum
C.
Uranium
D.
Rutherfordium
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Solution
Rutherfordium (Rf) has the highest atomic number among the given options.
Correct Answer:
D
— Rutherfordium
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Q. Which of the following elements has the highest electronegativity based on its electronic configuration?
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Solution
Chlorine (Cl) has the highest electronegativity and its configuration is 1s2 2s2 2p6 3s2 3p5.
Correct Answer:
B
— Cl
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Q. Which of the following elements has the highest electronegativity in the p-block?
A.
Fluorine
B.
Chlorine
C.
Bromine
D.
Iodine
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Solution
Fluorine has the highest electronegativity among the p-block elements.
Correct Answer:
A
— Fluorine
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Q. Which of the following elements has the highest electronegativity?
A.
Fluorine
B.
Oxygen
C.
Nitrogen
D.
Chlorine
Show solution
Solution
Fluorine is the most electronegative element with an electronegativity value of 4.0 on the Pauling scale.
Correct Answer:
A
— Fluorine
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Q. Which of the following elements has the highest energy level in its electronic configuration?
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Solution
Potassium (K) has the highest energy level with the configuration [Ar] 4s1.
Correct Answer:
B
— K
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Q. Which of the following elements has the highest first ionization energy?
A.
Lithium
B.
Beryllium
C.
Boron
D.
Carbon
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Solution
Carbon has the highest first ionization energy among the given elements.
Correct Answer:
D
— Carbon
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Q. Which of the following elements has the highest ionization energy?
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Solution
Lithium (Li) has the highest ionization energy among the given alkali metals due to its smaller atomic size.
Correct Answer:
A
— Li
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Q. Which of the following elements has the highest melting point among the d-block elements?
A.
Iron
B.
Tungsten
C.
Copper
D.
Nickel
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Solution
Tungsten has the highest melting point among the d-block elements due to its strong metallic bonding.
Correct Answer:
B
— Tungsten
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Q. Which of the following elements has the highest melting point?
A.
Zirconium
B.
Tungsten
C.
Ruthenium
D.
Osmium
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Solution
Osmium has the highest melting point among the given options due to its strong metallic bonding.
Correct Answer:
D
— Osmium
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Q. Which of the following elements has the largest first ionization energy?
A.
Lithium
B.
Beryllium
C.
Boron
D.
Carbon
Show solution
Solution
Carbon has a larger first ionization energy compared to the other elements listed.
Correct Answer:
D
— Carbon
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Q. Which of the following elements has the largest ionic radius?
A.
Na+
B.
Mg2+
C.
Al3+
D.
K+
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Solution
K+ has the largest ionic radius among the given options.
Correct Answer:
D
— K+
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Q. Which of the following elements has the smallest atomic radius?
A.
Sodium
B.
Chlorine
C.
Argon
D.
Fluorine
Show solution
Solution
Fluorine has the smallest atomic radius among the given elements.
Correct Answer:
D
— Fluorine
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Q. Which of the following elements is a d-block element?
A.
Sodium
B.
Iron
C.
Calcium
D.
Boron
Show solution
Solution
Iron (Fe) is a d-block element as it has partially filled d-orbitals.
Correct Answer:
B
— Iron
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Q. Which of the following elements is a halogen?
A.
Oxygen
B.
Nitrogen
C.
Fluorine
D.
Neon
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Solution
Fluorine is a halogen, found in Group 17 of the periodic table.
Correct Answer:
C
— Fluorine
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Q. Which of the following elements is a member of the actinide series?
A.
Radium
B.
Plutonium
C.
Barium
D.
Thorium
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Solution
Plutonium is a member of the actinide series, which includes elements with atomic numbers 89 to 103.
Correct Answer:
B
— Plutonium
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Q. Which of the following elements is a metalloid in the p-block?
A.
Boron
B.
Aluminium
C.
Gallium
D.
Indium
Show solution
Solution
Boron is classified as a metalloid in the p-block.
Correct Answer:
A
— Boron
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Q. Which of the following elements is a metalloid?
A.
Boron
B.
Sodium
C.
Calcium
D.
Chlorine
Show solution
Solution
Boron is classified as a metalloid in the periodic table.
Correct Answer:
A
— Boron
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Q. Which of the following elements is a noble gas?
A.
Helium
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Show solution
Solution
Helium is a noble gas, located in Group 18 of the periodic table.
Correct Answer:
A
— Helium
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Q. Which of the following elements is a p-block element?
A.
Calcium
B.
Sodium
C.
Bromine
D.
Iron
Show solution
Solution
Bromine is a p-block element as it is located in group 17 of the periodic table.
Correct Answer:
C
— Bromine
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