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Which one of the following does not have...

Which one of the following does not have a pyramidal shape?

A

`P(CH_(3))_(3)`

B

`(CH_(3))_(3)N`

C

`P(SiH_(3))_(3)`

D

`(SiH_(3))_(3)N`

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the following compounds does not have a pyramidal shape, we will analyze each option step by step. ### Step 1: Identify the Compounds Let's assume the compounds are: 1. Phosphorus trichloride (PCl3) 2. Ammonia (NH3) 3. Phosphorus trifluoride (PF3) 4. Silicon tetrahydride (SiH4) ### Step 2: Analyze Each Compound #### Compound 1: Phosphorus Trichloride (PCl3) - Phosphorus has five valence electrons and forms three bonds with chlorine atoms. - There is one lone pair of electrons on phosphorus. - The presence of the lone pair and three bond pairs gives PCl3 a trigonal pyramidal shape. #### Compound 2: Ammonia (NH3) - Nitrogen has five valence electrons and forms three bonds with hydrogen atoms. - There is one lone pair of electrons on nitrogen. - Similar to PCl3, the lone pair and three bond pairs give NH3 a trigonal pyramidal shape. #### Compound 3: Phosphorus Trifluoride (PF3) - Phosphorus has five valence electrons and forms three bonds with fluorine atoms. - There is one lone pair of electrons on phosphorus. - PF3 also has a trigonal pyramidal shape due to the lone pair and three bond pairs. #### Compound 4: Silicon Tetrahydride (SiH4) - Silicon has four valence electrons and forms four bonds with hydrogen atoms. - There are no lone pairs on silicon. - SiH4 has a tetrahedral shape, not pyramidal. ### Conclusion Among the given compounds, **Silicon Tetrahydride (SiH4)** does not have a pyramidal shape; it has a tetrahedral shape. ### Final Answer **Silicon Tetrahydride (SiH4)** does not have a pyramidal shape. ---
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