Question

Match List - I with List - II according to shape. List - I A. XeO\(_3\) B. XeF\(_2\) C. XeO\(_2\)F\(_2\) D. XeOF\(_4\) List - II I. BrF\(_5\) II. NH\(_3\) III. [I\(_3\)]\(^{-}\) IV. SF\(_4\) Choose the correct answer from the options given below:

• A. A-II, B-III, C-I, D-IV
• B. A-II, B-I, C-III, D-IV
• C. A-II, B-III, C-IV, D-I
• D. A-III, B-II, C-IV, D-I

Hint:

For xenon compounds, use VSEPR theory: - Count bonding pairs and lone pairs. - Match with known reference molecules (NH\(_3\), [I\(_3\)]\(^{-}\), BrF\(_5\), SF\(_4\)).

Answer 1

The Correct Option is A

To match the compounds in List - I with their corresponding shapes in List - II, we will analyze the molecular geometry of each compound based on the VSEPR theory (Valence Shell Electron Pair Repulsion theory). This theory helps predict the shape of molecules based on the repulsion between electron pairs around the central atom.

1. XeO\(_3\): Xenon trioxide is an example of a molecule with trigonal pyramidal geometry. The central xenon atom is surrounded by three oxygen atoms and effectively has one lone pair of electrons, leading to a structure similar to that of NH\(_3\) (Ammonia), which also has a trigonal pyramidal shape. Therefore, match with II. NH\(_3\).
2. XeF\(_2\): Xenon difluoride is a linear molecule, similar to the structure of [I\(_3\)]\(^{-}\) (triiodide ion), which is also known to have a linear geometry. Therefore, match with III. [I\(_3\)]\(^{-}.
3. XeO\(_2\)F\(_2\): This molecule has a seesaw shape because the central xenon atom is surrounded by two oxygen atoms and two fluorine atoms. The analogous structure is SF\(_4\) (sulfur tetrafluoride), which also exhibits a seesaw geometry. Therefore, match with IV. SF\(_4\).
4. XeOF\(_4\): Xenon oxytetrafluoride has a square pyramidal geometry, similar to BrF\(_5\) (bromine pentafluoride). Both have a square pyramidal shape due to one central atom surrounded by five other atoms and one lone pair. Therefore, match with I. BrF\(_5\).

Based on the detailed analysis, the correct matching is:

• A-II (XeO\(_3\) matches with NH\(_3\))
• B-III (XeF\(_2\) matches with [I\(_3\)]\(^{-}\))
• C-I (XeO\(_2\)F\(_2\) matches with BrF\(_5\))
• D-IV (XeOF\(_4\) matches with SF\(_4\))

Thus, the correct answer is: A-II, B-III, C-I, D-IV.