Quantrex Academy Quantrex AcademyPYQs with solutions · JEE · NEET · NDA

Home · JEE Main & Advanced · NSEC · Chemical Bonding and Molecular Structure

Chemical Bonding and Molecular Structure — JEE Main & Advanced NSEC PYQs

34 previous year questions from Chemical Bonding and Molecular Structure with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

34 questionsNSECSolutions on every page
1

In ammonia the bond angle is 107^ 48^ while in SbH ₃ the bond angle is about 91^ 18^ . The correct explanation among the followings is/ are

Olympiad workbook Solution View → 2

Which of the following compounds contain 3-centered 2-electron bonding? (i) [ BeF ₂ ]_ n (ii) [ Be ( CH ₃ )₃ ]_ n (iii) [ BeCl ₂ ]_ n (iv) [ BeH ₂ ]_ n

Olympiad workbook Solution View → 3

In the Lewis structure of ozone ( O ₃ ) , the formal charge on the central oxygen atom is

Olympiad workbook Solution View → 4

HClO ₄ is a stronger acid than HClO . The correct statement is

Olympiad workbook Solution View → 5

The pair that is isostructural (i.e. having the same shape and hybridization) is

Olympiad workbook Solution View → 6

At 25^ C , nitrogen exists as N ₂ and phosphorous exists as P ₄ because

Olympiad workbook Solution View → 7

Assuming that Hund's rule is violated by the diatomic molecule B ₂ , its bond order and magnetic nature will be respectively

Olympiad workbook Solution View → 8

Iodine is a solid and sublimes at ordinary temperatures. This is because of

Olympiad workbook Solution View → 9

Which of the following represents the correct order of dipole moment?

Olympiad workbook Solution View → 10

Which of the following is not a pair of a Lewis acid and a Lewis base?

Olympiad workbook Solution View → 11

Which of the following has the shortest bond length?

Olympiad workbook Solution View → 12

In which of the following, all the bond lengths are not the same? I. IF ₄ ⁺ II. BF ₄ ⁻ III. SF ₄ IV. TeCl ₄

Olympiad workbook Solution View → 13

Which among the following is nonlinear?

Olympiad workbook Solution View → 14

The molecule in which all atoms are not coplanar is

Olympiad workbook Solution View → 15

The most stable Lewis structure of N ₂ O is

Olympiad workbook Solution View → 16

The set in which all the species are diamagnetic is

Olympiad workbook Solution View → 17

Among the following, the compound that has the highest dipole moment is

Olympiad workbook Solution View → 18

Which of the following species has one lone pair of electrons on the central atom?

Olympiad workbook Solution View → 19

In solid state, PCl ₅ exists as [ PCl ₄ ]⁺ [ PCl ₆ ]⁻ . The hybridization of P atoms in this solid is/are

Olympiad workbook Solution View → 20

A suboxide of carbon, C ₃ O ₂ , has a linear structure. Which of the following is correct about C ₃ O ₂ ? I. Oxidation state of all three C atoms is +2 II. Oxidation state of the c

Olympiad workbook Solution View → 21

Among the following, maximum number of resonance structures is possible for

Olympiad workbook Solution View → 22

Reaction of ammonia with diborane gives an ionic product ( B ₂ H ₆ .2 NH ₃ ) . The hybridization of boron in the cation and anion of this product are respectively

Olympiad workbook Solution View → 23

In which of the following species the octet rule is NOT obeyed? I. I ₃ ⁻ II. N ₂ O III. OF ₂ IV. NO ⁺

Olympiad workbook Solution View → 24

The F - X - F bond angle is the smallest in ( X is the central atom)

Olympiad workbook Solution View → 25

Among the following sets, the one in which all the molecules are non polar is

Olympiad workbook Solution View → 26

The structures of hydrogen peroxide ( H ₂ O ₂ ) in the solid and gaseous states are given below. H ₂ O ₂ (l) is slightly more viscous than H ₂ O (l). The correct option/s among the

Olympiad workbook Solution View → 27

Which of the following option/s is /are correct?

Olympiad workbook Solution View → 28

Which of the following reactions is NOT an example of Lewis acid-Lewis base reaction?

Olympiad workbook Solution View → 29

The resonance structures of SCN ⁻ are given below along with the S - C and C - N bond lengths S-C (in pm) C-N (in pm) SCN‾ 165 117 Single bond 181 147 Double bond 155 128 Triple bo

Olympiad workbook Solution View → 30

Solvents are classified as polar and nonpolar based on their dipole moments. Given below are some solvents. (p) 1,2-dibromobenzene (q) diisopropylether (r) trans-1,2-dichloroethene

Olympiad workbook Solution View → 31

Hybridization of S in CH ₃ SH molecule is

Olympiad workbook Solution View → 32

The number of 'two-center-two electron' and 'three-center-two electron' bonds in [ Al ( BH ₄ )₃ ] are respectively

Olympiad workbook Solution View → 33

The correct statement(s) regarding three EI ₃ molecules (where E = P , As or Sb ) is/are:

Olympiad workbook Solution View → 34

For the given compound, % s character of phosphorous hybrid orbitals which contribute to various bonds are given in the table below. This difference in % 's' character of various p

Olympiad workbook Solution View →
Practice all Chemical Bonding and Molecular Structure questions in the app →