Question:
Polar molecules are those in which
Polar molecules are those in which
Show Hint
Think about where the centres of positive and negative charge lie.
Updated On: Nov 12, 2026
- they have symmetric shape.
- centre of mass of positive charges does not coincide with centre of mass of negative charges.
- they have no permanent dipole moments.
- centre of mass of positive charges coincide with centre of mass of negative charges.
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
A polar molecule has a permanent electric dipole moment.
Step 2: Condition
This happens when the centre of positive charge does not coincide with the centre of negative charge.
Step 3: Conclusion
So the statement about non-coinciding centres of charge describes polar molecules.
Final Answer:
In polar molecules the centres of positive and negative charge do not coincide. \[ \boxed{\text{(B) }\text{centre of mass of positive charges does not coincide with centre of mass of negative charges}} \]
A polar molecule has a permanent electric dipole moment.
Step 2: Condition
This happens when the centre of positive charge does not coincide with the centre of negative charge.
Step 3: Conclusion
So the statement about non-coinciding centres of charge describes polar molecules.
Final Answer:
In polar molecules the centres of positive and negative charge do not coincide. \[ \boxed{\text{(B) }\text{centre of mass of positive charges does not coincide with centre of mass of negative charges}} \]
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