Please Answer ALL. thanks Which one of the following compounds obeys the \'octet

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Please Answer ALL.

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Which one of the following compounds obeys the 'octet rule'? A. NO_2 B. BF_3 C. XeF_2 D. SF_6 E. H_2S How many electron domains surround the central atom in the XeF_2? A. 2 B. 3 C. 4 D. 5 E. 6 Which one of the following gives the correct electron domain geometry and molecular geometry for the species I_3^-? Electron domain geometry Molecular geometry A. Linear Linear B. Trigonal planar Bent C. Tetrahedral Bent D. Trigonal bipyramidal Linear E. Trigonal bipyramidal Bent Which one of the following gives the correct electron domain geometry and molecular geometry for the species ICI_4^-? Electron domain geometry Molecular geometry A. Tetrahedral Tetrahedral B. Trigonal bipyramidal T-shaped C. Octahedral Square planar D. Octahedral Square pyramidal E. Trigonal bipyramidal Seesaw What type of electron domain geometry is associated with the carbon atom in HCN? A. Linear B. Trigonal planar C. Tetrahedral D. Trigonal bipyramidal E. Octahedral

Explanation / Answer

9) H2S follow octet rule.

11) triiodide ion has Iodide as the middle atom and possess 3 lone electron pair and it has two iodide attatched to it.

Iodide has 7 electrons and one negative charge so there are total 8 electrons.there are three lone pair of electron and 2 bond pair of electron so in total there are 5 electron pair So it has trigonal bipyramidal geomatry and linear molecular geomatry.

12) Iodide is the middle atom it gives 7 electron and chlorine also gives 7 electron and a single negative charge is also there.hence there are four bonding pair and two lone pair.hence it possess square planar and octahedron geomatry.

13) HCN possess linear gemotary because the electron cloud which surrounds the Carbon atom which is the middle atom will repel each other.

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