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Chemical Bonding and Molecular Structure · Question 1

JEE Main 2026 (Online) 8th April Evening ShiftMCQEasy📈 Topic in 32% papers+4−1
1

Bromine trifluoride autoionizes to form BrF2 and BrF4 . The shapes of the cation and anion are respectively and .

  1. bent, square planar
  2. linear, square planar
  3. bent, see-saw
  4. linear, tetrahedral

Answer

(1) bent, square planar

Solution

2BrF3 BrF2 + BrF4 (Br has 7 valence electrons)

BrF2 : electron pairs = 7 + 2 - 12 = 4 ⇒ 2 bond pairs + 2 lone pairs (sp3) ⇒ bent (V-shaped)

BrF4 : electron pairs = 7 + 4 + 12 = 6 ⇒ 4 bond pairs + 2 lone pairs (sp3d2); the two lone pairs occupy trans (axial) positions ⇒ square planar

Answer: (1)

JEE Main 2026 (Online) 8th April Evening Shift

Keep practising — Chemical Bonding and Molecular Structure

2

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
JEE Main 2026 (Online) 6th April Morning 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

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
5

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
6

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
7

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
8

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
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. 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) 2nd April Morning Shift
10

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
11

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

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