Question:
The bond angles in the following molecules decreases in the order \( BF_3, NH_3, PF_3 \) and \( XeF_2 \)
The bond angles in the following molecules decreases in the order \( BF_3, NH_3, PF_3 \) and \( XeF_2 \)
Show Hint
More lone pairs decrease bond angleLinear molecules have maximum bond angle (180°).
Updated On: May 6, 2026
- \( NH_3 > PF_3 > XeF_2 > BF_3 \)
- \( XeF_2 > BF_3 > NH_3 > PF_3 \)
- \( BF_3 > NH_3 > XeF_2 > PF_3 \)
- \( PF_3 > BF_3 > NH_3 > XeF_2 \)
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Identify molecular geometry.
\[ BF_3 \rightarrow \text{Trigonal planar (120°)} \]
\[ NH_3 \rightarrow \text{Trigonal pyramidal (~107°)} \]
\[ PF_3 \rightarrow \text{Trigonal pyramidal (less than 107°)} \]
\[ XeF_2 \rightarrow \text{Linear (180°)} \]
Step 2: Compare bond angles.
\[ XeF_2 = 180^\circ \]
\[ BF_3 = 120^\circ \]
\[ NH_3 \approx 107^\circ \]
\[ PF_3 < 107^\circ \]
Step 3: Arrange in decreasing order.
\[ 180^\circ > 120^\circ > 107^\circ > \text{(less than 107°)} \]
\[ XeF_2 > BF_3 > NH_3 > PF_3 \]
Step 4: Final conclusion.
\[ \boxed{XeF_2 > BF_3 > NH_3 > PF_3} \]
\[ BF_3 \rightarrow \text{Trigonal planar (120°)} \]
\[ NH_3 \rightarrow \text{Trigonal pyramidal (~107°)} \]
\[ PF_3 \rightarrow \text{Trigonal pyramidal (less than 107°)} \]
\[ XeF_2 \rightarrow \text{Linear (180°)} \]
Step 2: Compare bond angles.
\[ XeF_2 = 180^\circ \]
\[ BF_3 = 120^\circ \]
\[ NH_3 \approx 107^\circ \]
\[ PF_3 < 107^\circ \]
Step 3: Arrange in decreasing order.
\[ 180^\circ > 120^\circ > 107^\circ > \text{(less than 107°)} \]
\[ XeF_2 > BF_3 > NH_3 > PF_3 \]
Step 4: Final conclusion.
\[ \boxed{XeF_2 > BF_3 > NH_3 > PF_3} \]
Was this answer helpful?
0
0
Top COMEDK UGET Chemistry Questions
- 0.3 g of an acid is neutralised by 40 $cm^3$ of 0.125 N NaOH. Equivalent mass of the acid is
- Bakelite is manufactured by using a mixture of
- An example for a face centred cubic lattice is
- Coordination number of caesium in caesium chloride is
- Which one of the following is not ferromagnetic?
View More Questions
Top COMEDK UGET Molecular Geometry Questions
- Given are 4 pairs of covalent molecules. Identify the pair in which both molecules have the same shape.
- From among the 4 given compounds identify the compounds which possess a net dipole moment.
- The maximum polarity and dipole moment among the following is :
- Which of the following has zero dipole moment ?
Top COMEDK UGET Questions
- If the line px + qy = 0 coincides with one of the lines given by $ax^2 + 2hxy + by^2 = 0$, then
- A long hollow copper pipe carries a current. The magnetic field producted will be
- An ammeter reads 0 to 10 A. It has negligible resistance.To convert this into voltmeter to read upto 250 V, resistance to be used is
- Force of attraction or repulsion between two current carrying wires separated by a distance r is proportional to
- When a material is placed in a magnetic field B, a magnetic moment proportional tc B but in a direction opposite to B is induced. The material is
View More Questions