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Chemical Bonding and Molecular Structure · Question 2

JEE Main 2026 (Online) 6th April Morning ShiftMCQMedium📈 Topic in 10% papers+4−1
1

The pairs among A = [SO32-, CO32-], B = [O22-, F2], C = [CN-, CO], D = [NH3, H3O+] and E = [MnO42-, CrO42-] that do not have similar Lewis dot structure are

  1. A, B and E
  2. A and E
  3. B, C and D
  4. C and D

Answer

(2) A and E

Solution

Species with the same number of valence electrons and the same skeleton have similar Lewis dot structures.

B. O22- and F2: 14 valence electrons each; single bond, three lone pairs on each atom ⇒ similar

C. CN- and CO: 10 valence electrons each; triple bond, one lone pair on each atom ⇒ similar

D. NH3 and H3O+: 8 valence electrons each; three bond pairs and one lone pair on the central atom ⇒ similar

A. SO32- (26 valence electrons) has a lone pair on S (pyramidal); CO32- (24 valence electrons) has no lone pair on C (trigonal planar) ⇒ not similar

E. CrO42- (32 valence electrons): Cr(+6), 3d0, all electrons paired; MnO42- (33 valence electrons): Mn(+6), 3d1, one unpaired electron ⇒ not similar

∴ Pairs A and E do not have similar Lewis dot structures.

Answer: (2)

JEE Main 2026 (Online) 6th April Morning Shift

Keep practising — Chemical Bonding and Molecular Structure

2

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. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 6th April Evening Shift
3

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. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 6th April Evening Shift
4

Consider the following species: BrF5, XeF5-, BF4-, ICl4-, XeF4, SF4, NH4+, ClF3, XeF2, ICl2- Number of species having sp3d hybridized central atom is .

JEE Main 2026 (Online) 5th April Morning Shift
5

The covalent radii of atoms A and B are rA and rB, respectively. The covalent bond length and total length of AB molecule are respectively

  1. (rA + rB), 2(rA + rB)
  2. 12(rA + rB), (rA + rB)
  3. (rA + rB), (rA + rB)
  4. 2(rA + rB), 12(rA + rB)
JEE Main 2026 (Online) 5th April Evening Shift
6

According to Lewis theory, the total number of bond-pairs and lone pair of electrons around the central atom of XeO64- ion is .

JEE Main 2026 (Online) 4th April Morning Shift
7

Which of the following pictorial diagrams most correctly represents the * ( antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction ( z-axis) ?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
JEE Main 2026 (Online) 4th April Evening Shift
8

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. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
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9

SF4 is isostructural with : Choose the correct answer from the options given below :

  1. C Only
  2. C and E Only
  3. A and D Only
  4. B and E Only
JEE Main 2026 (Online) 2nd April Evening Shift
10

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 false
  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 true
JEE Main 2026 (Online) 28th January Morning Shift
11

Match List-I with List-II according to shape. Choose the correct answer from the options given below :

  1. A-II, B-III, C-I, D-IV
  2. A-III, B-II, C-IV, D-I
  3. A-II, B-III, C-IV, D-I
  4. A-II, B-I, C-III, D-IV
JEE Main 2026 (Online) 28th January Evening Shift

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