Question:
Identify a molecule having highest dipole moment from following.
Identify a molecule having highest dipole moment from following.
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Compare dipole moments: BeF\(_2\) is linear and zero, and water has the largest value among the rest.
Updated On: Oct 1, 2026
- \(\text{NH}_3\)
- \(\text{H}_2\text{O}\)
- \(\text{CHCl}_3\)
- \(\text{BeF}_2\)
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Dipole moment depends on bond polarity and on molecular shape. Bond dipoles can cancel in a symmetric shape.
Step 2: Detailed Explanation
BeF\(_2\) is linear, so the two Be-F dipoles cancel and the moment is zero.
CHCl\(_3\) is tetrahedral and the three C-Cl dipoles partly cancel, giving about 1.0 D.
NH\(_3\) is pyramidal with a lone pair, giving about 1.47 D.
H\(_2\)O is bent with two lone pairs and very polar O-H bonds, giving about 1.85 D, the highest of the four.
Final Answer:
Water has the highest dipole moment, option (B). \[ \boxed{\text{H}_2\text{O (B)}} \]
Dipole moment depends on bond polarity and on molecular shape. Bond dipoles can cancel in a symmetric shape.
Step 2: Detailed Explanation
BeF\(_2\) is linear, so the two Be-F dipoles cancel and the moment is zero.
CHCl\(_3\) is tetrahedral and the three C-Cl dipoles partly cancel, giving about 1.0 D.
NH\(_3\) is pyramidal with a lone pair, giving about 1.47 D.
H\(_2\)O is bent with two lone pairs and very polar O-H bonds, giving about 1.85 D, the highest of the four.
Final Answer:
Water has the highest dipole moment, option (B). \[ \boxed{\text{H}_2\text{O (B)}} \]
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