H2O is polar, whereas BeF2 is not. It is because [2004]a)the electronegativity of F is greater than that of Ob)H2O involves hydrogen bonding wher eas BeF2 is a discrete moleculec)H2O is linear and BeF2 is angulard)H2O is angular and BeF2 is linearCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

In a linear symmetrical molecule like BeF₂, the bond angle between three atoms is 180°, hence the polarity due to one bond is cancelled by the equal polarity due to other bond, while it is not so in angular molecules, like H₂O

Answer

H2O has a high bond when compared with BeF2 . Hence H2O is polar, BeF2 is non-polar.

Explanation:

The polar molecule mainly depends on its shape and molecular structure. For H2O it is vertical and hence it is a polar molecule. BeF2has no dipolar moment and it has a long pair moment.

H2O is the linear shape and hence it has a dipole moment. But BeF2 has no dipolar moment and it has a long pair moment.

Answer

Explanation:

Introduction:
In order to understand why H2O is angular and BeF2 is linear, we need to consider the molecular geometry and the bonding between the atoms. The polarity of a molecule is determined by the arrangement of its atoms and the distribution of its electrons.

1. Polarity of H2O:
H2O is a polar molecule due to its bent or angular shape and the presence of polar covalent bonds. The oxygen atom in H2O is more electronegative than the hydrogen atoms, leading to an uneven distribution of electron density in the molecule.

2. Molecular Geometry of H2O:
H2O has a bent or angular shape. This shape is a result of the two lone pairs of electrons on the oxygen atom, which repel the bonding pairs of electrons and create a distortion in the molecular structure.

3. Bonding in H2O:
H2O molecules are held together by hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (in this case, oxygen) and is attracted to another electronegative atom in a different molecule.

4. Polarity of BeF2:
BeF2 is a nonpolar molecule because it has a linear shape and the electronegativity difference between beryllium and fluorine is negligible.

5. Molecular Geometry of BeF2:
BeF2 has a linear shape. This shape is a result of the arrangement of the atoms and the absence of any lone pairs of electrons on the central beryllium atom.

6. Bonding in BeF2:
BeF2 molecules are held together by ionic bonds. Beryllium, being a metal, donates its electrons to the fluorine atoms, resulting in the formation of positively charged beryllium ions and negatively charged fluoride ions.

Conclusion:
In summary, H2O is angular and polar due to its molecular geometry and the presence of hydrogen bonding. On the other hand, BeF2 is linear and nonpolar due to its molecular geometry and the absence of any significant electronegativity difference between beryllium and fluorine.

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