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Chemical Bonding and Molecular Structure · Question 6

JEE Main 2026 (Online) 5th April Evening ShiftMCQEasy📈 Topic in 10% papers+4−1
1

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)

Answer

(1) (rA + rB), 2(rA + rB)

Solution

As per NCERT, the covalent bond length is the distance between the nuclei of the bonded atoms: R = rA + rB.

[figure]

The total length of the AB molecule runs from the outer edge of A to the outer edge of B:

Total length = rA + (rA + rB) + rB

⇒ Total length = 2rA + 2rB = 2(rA + rB)

∴ Bond length = (rA + rB), total length = 2(rA + rB)

Answer: (1)

JEE Main 2026 (Online) 5th April Evening Shift

Keep practising — Chemical Bonding and Molecular Structure

2

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
3

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
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) 2nd April Morning Shift
5

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
6

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
7

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
8

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
JEE Main 2026 (Online) 24th January Morning Shift
9

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
10

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
11

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

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