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Chemical Bonding and Molecular Structure · Question 13

JEE Main 2026 (Online) 24th January Morning ShiftMCQMedium📈 Topic in 6% papers+4−1
1

Given below are statements about some molecules/ions. Identify the CORRECT statements. Choose the correct answer from the options given below:

  1. B & C Only
  2. B, C & D Only
  3. A, C & D Only
  4. A, B, C, D & E

Answer

(1) B & C Only

Solution

A. In NH3 the lone pair moment and the N–H bond moments act in the same direction, whereas in NF3 the N–F bond moments oppose the lone pair moment.

(NH3) = 1.47 D > (NF3) = 0.24 D. Incorrect.

B. BeH2 is linear (H–Be–H, 180 ); the two equal bond moments cancel = 0. Correct.

C. O22- (18 electrons): bond order = 10 - 82 = 1

F2 (18 electrons): bond order = 10 - 82 = 1 same. Correct.

D. In O3 (O=O–O), the central O has 1 lone pair and 3 bonds:

Formal charge = 6 - 2 - 12(6) = +1, not −1. Incorrect.

E. NO2 has 17 valence electrons (odd electron molecule); N does not complete its octet. Incorrect.

Only B and C are correct.

Answer: (1)

JEE Main 2026 (Online) 24th January Morning Shift

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2

Among the following, the CORRECT combinations are Choose the correct answer from the options given below:

  1. B, C and D Only
  2. A, B, C and D
  3. A, B and C Only
  4. A and B Only
JEE Main 2026 (Online) 24th January Morning Shift
3

Pair of species among the following having same bond order as well as paramagnetic character will be-

  1. O2-, N2+
  2. O2+, N22-
  3. O2-, N2-
  4. O2+, N2-
JEE Main 2026 (Online) 24th January Evening Shift
4

Identify the molecule (X) with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among HNO3, H2SO4, NF3 and O3. Choose the correct bond angle made by the central atom of the molecule (X).

  1. 107
  2. 102
  3. 120
  4. 116
JEE Main 2026 (Online) 23rd January Morning Shift
5

Which statements are NOT TRUE about XeO2F2? Choose the correct answer from the options given below :

  1. B, D and E Only
  2. B and D Only
  3. B, C and E Only
  4. A and D Only
JEE Main 2026 (Online) 23rd January Evening Shift
6

Two p-block elements X and Y form fluorides of the type EF3. The fluoride compound XF3 is a Lewis acid and YF3 is a Lewis base. The hybridizations of the central atoms of XF3 and YF3 respectively are

  1. sp2 and sp3
  2. Both sp3
  3. Both sp2
  4. sp3 and sp2
JEE Main 2026 (Online) 22nd January Morning Shift
7

The formal charges on the atoms marked as (1) to (4) in the Lewis representation of HNO3 molecule respectively are [figure]

  1. 0, 0, -1, +1
  2. 0, -1, 0, +1
  3. 0, +1, 0, -1
  4. +1, 0, 0, -1
JEE Main 2026 (Online) 22nd January Morning Shift
8

Among H2S, H2O, NF3, NH3 and CHCl3, identify the molecule (X) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule (X) is :

  1. 3
  2. 2
  3. 0
  4. 1
JEE Main 2026 (Online) 22nd January Evening Shift
9

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below:

  1. Both Statement I and Statement II are true
  2. Statement I is true but Statement II is false
  3. Statement I is false but Statement II is true
  4. Both Statement I and Statement II are false
JEE Main 2026 (Online) 21st January Morning Shift
10

The correct increasing order of C-H(A), C-O(B), C=O(C) and C N(D) bonds in terms of covalent bond length is :

  1. D < C < B < A
  2. D < C < A < B
  3. A < B < C < D
  4. A < D < C < B
JEE Main 2026 (Online) 21st January Evening Shift
11

Match the List I with List II. Choose the correct answer from the options given below:

  1. A-IV, B-III, C-II, D-I
  2. A-III, B-IV, C-I, D-II
  3. A-II, B-I, C-IV, D-III
  4. A-III, B-IV, C-II, D-I
JEE Main 2025 (Online) 7th April Morning Shift

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