Chemical Bonding And Molecular Structure JEE Mains Questions - List Of Most Asked Questions With Solutions

NTA will shortly release the JEE Main Syllabus 2025 at jeemain.nta.ac.in. Last Year, the complete syllabus of JEE Main underwent some major changes. According to the latest syllabus guidelines, the weightage of Physics has dropped to 22.5%. Due to these changes in the syllabus, certain shifts in chapter-wise weightage have been observed. Chemical bonding and molecular structure are among such topics. It’s among the least weightage topics in JEE Main Physics Syllabus 2025. This chapter holds 1.39% weightage in the whole syllabus.

Chemical bonding and molecular structure is a part of the General Physics section, and every year around 2-3 questions are asked from this chapter. Due to the drop in weightage, you can expect 1-2 questions in JEE Main 2025.
Chemical bonding and molecular structure in JEE Mains Physics Syllabus 2025 covers all the basic concepts on units and measurements, fundamentals of units, dimensions etc.

Aspirants consider chemical bonding and molecular structure as one of the Easiest Chapters in Physics for JEE Main 2025. Even though this chapter has the least weightage in the syllabus, to develop a strong foundation in physics, this particular chapter plays a pivotal role. Hence the candidates need to develop a clear understanding of this chapter. The list of most asked questions from this chapter will help the students with their preparation.

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Some common questions about chemical bonding and molecular structure for JEE Main include:

What are Lewis symbols?
A Lewis symbol is a simplified version of Bohr's diagram that shows the electrons in an atom's outermost energy level.
What are the different types of chemical bonds?
Chemical bonds can be ionic, covalent, metallic, dipole–dipole interactions, the London dispersion force, and hydrogen bonding.
What is hybridization?
Hybridization is the process of redistributing energies of atomic orbitals to create new hybrid orbitals with different shapes and properties.
How do chemical bonds form?
Chemical bonds form when electrons are redistributed, moving both participating elements towards stability.
How are chemical bonds described?
Chemical bonds can be strong or weak, with strong bonds including covalent, ionic, and metallic bonds, and weak bonds including dipole–dipole interactions, the London dispersion force, and hydrogen bonding.

The chapter on chemical bonding and molecular structure is considered one of the most important and high-scoring chapters for competitive exams like JEE Main. To prepare for the exam, students can:

Practice with sample papers to get a feel for the exam and identify strengths and weaknesses

Use model papers and question papers to get an idea of the types of questions that are frequently asked

Build a strong foundation in chemical bonding to enhance overall chemistry knowledge

Chemical bonding and molecular structure JEE Mains Questions - List Of Most Asked Questions With Solutions

In the (JEE) Main, the topic of Physics and Measurement often features questions that have appeared multiple times in previous years. Many questions in this section are either repeated or follow similar patterns, with only minor changes, such as different numerical values or slight modifications in wording.Certain questions have been repeated as many as five times.

Here are some of the most frequently asked and repeated questions:

Question 1:

Which of the following molecules has a linear shape?

A) CH4

B) H2O

C) CO2

D) NH3

Solution: The correct answer is C) CO2. Explanation: CO2 has a linear shape due to the presence of double bonds between the carbon and oxygen atoms.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 2:

What is the hybridization of the central atom in the molecule BF3?

A) sp

B) sp²

C) sp³

D) dsp²

Solution: The correct answer is B) sp². Explanation: The boron atom in BF3 is surrounded by three bonding pairs and has no lone pairs, resulting in sp² hybridization.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 3:

What is the bond angle in a tetrahedral molecule like CH4?

A) 109.5°

B) 120°

C) 180°

D) 90°

Solution: The correct answer is A) 109.5°. Explanation: In a tetrahedral molecular geometry, the bond angles are approximately 109.5°.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 4:

Which of the following molecules is nonpolar?

A) HCl

B) NH3

C) CH4

D) H2O

Solution: The correct answer is C) CH4. Explanation: CH4 has a symmetrical shape, and the dipole moments cancel out, making it nonpolar.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 5:

What type of bond is formed between sodium and chlorine in NaCl?

A) Covalent bond

B) Ionic bond

C) Metallic bond

D) Hydrogen bond

Solution: The correct answer is B) Ionic bond. Explanation: NaCl is formed by the transfer of electrons from sodium to chlorine, resulting in ionic bonding.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 6:

Which of the following has the highest electronegativity?

A) Na

B) Cl

C) Mg

D) K

Solution: The correct answer is B) Cl. Explanation: Chlorine is more electronegative than sodium, magnesium, and potassium.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 7:

What is the molecular geometry of SF6?

A) Tetrahedral

B) Square planar

C) Octahedral

D) Trigonal bipyramidal

Solution: The correct answer is C) Octahedral. Explanation: SF6 has six bonding pairs around the sulfur atom, resulting in an octahedral geometry.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 8:

What is the shape of the water molecule (H2O)?

A) Linear

B) Bent

C) Tetrahedral

D) Trigonal planar

Solution: The correct answer is B) Bent. Explanation: The water molecule has a bent shape due to the presence of two lone pairs on the oxygen atom.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 9:

Which of the following is the strongest bond?

A) Single bond

B) Double bond

C) Triple bond

D) All are equal

Solution: The correct answer is C) Triple bond. Explanation: Triple bonds involve the sharing of three pairs of electrons, making them the strongest type of covalent bond.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

Question 10:

What is the hybridization of the central atom in the molecule H2O?

A) sp

B) sp²

C) sp³

D) dsp²

Solution: The correct answer is C) sp³. Explanation: The oxygen atom in H2O has two lone pairs and two bonding pairs, resulting in sp³ hybridization.

(This question has been asked thrice - JEE Main 2018, JEE Main 2022, JEE Main 2024)

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