Match List-I with List-II.
|
List-I (Species) |
List-II (Shape) |
||
|
(A) |
(I) |
Octahedral |
|
|
(B) |
SF6 |
(II) |
See-saw |
|
(C) |
SF4 |
(III) |
Trigonal pyramidal |
|
(D) |
NH3 |
(IV) |
Linear |
Choose the correct answer from the options given below:
A-IV, B-I, C-II, D-III
— This question requires matching chemical species with their respective shapes.This question requires matching chemical species with their respective shapes. The shape of a molecule is determined by its hybridization and the number of lone pairs on the central atom, according to VSEPR theory.
Step 1: Determine the shape of I3-.
The central iodine atom in I3- has 7 valence electrons. It forms two single bonds with two other iodine atoms and has 3 lone pairs. The steric number is 2 (bonds) + 3 (lone pairs) = 5. This corresponds to sp3d hybridization. With 3 lone pairs in the equatorial positions and two bond pairs in axial positions, the molecular geometry is linear.
So, A matches with (IV).
Step 2: Determine the shape of SF6.
The central sulfur atom in SF6 has 6 valence electrons. It forms six single bonds with six fluorine atoms and has 0 lone pairs. The steric number is 6 (bonds) + 0 (lone pairs) = 6. This corresponds to sp3d2 hybridization. With 6 bond pairs and no lone pairs, the molecular geometry is octahedral.
So, B matches with (I).
Step 3: Determine the shape of SF4.
The central sulfur atom in SF4 has 6 valence electrons. It forms four single bonds with four fluorine atoms and has 1 lone pair. The steric number is 4 (bonds) + 1 (lone pair) = 5. This corresponds to sp3d hybridization. With 4 bond pairs and 1 lone pair, the molecular geometry is see-saw.
So, C matches with (II).
Step 4: Determine the shape of NH3.
The central nitrogen atom in NH3 has 5 valence electrons. It forms three single bonds with three hydrogen atoms and has 1 lone pair. The steric number is 3 (bonds) + 1 (lone pair) = 4. This corresponds to sp3 hybridization. With 3 bond pairs and 1 lone pair, the molecular geometry is trigonal pyramidal.
So, D matches with (III).
Step 5: Match the options.
- A - (IV) Linear
- B - (I) Octahedral
- C - (II) See-saw
- D - (III) Trigonal pyramidal
This corresponds to option D.
Correct Answer: (D)
A-IV, B-I, C-II, D-III