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Hybridisation is a theoretical concept, ...

Hybridisation is a theoretical concept, as state of hybridisation can not be detected ever the spectroscopically: unlike intermediates or transition state in various reactions but it corrects the predictions which are based on overlapping of pure atomic orbitals. VSEPR theory predicts precisely shape and bond angle in a given molecule.
The structure of `XeF_(6)` in vapour phase is:

A

Peagonal bi pyramidal

B

Trigonal bi pyramidal

C

Capped octahedral

D

Squre bi pyramidal

Text Solution

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`XeF_(6)(sp^(3)d^(3))rarr6sigma+1 l.p`.
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Hybridisation is a theoretical concept, as state of hybridisation can not be detected ever the spectroscopically: unlike intermediates or transition state in various reactions but it corrects the predictions which are based on overlapping of pure atomic orbitals. VSEPR theory predicts precisely shape and bond angle in a given molecule. Which of the following is tetrahedral in shape?

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies . Ratio of lone pair-bond pair electrons on central atom in i_3^- and XeF_4 are respectively :

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies . Which statements are correct ? (1) C(CN)_(4) and C_(2)(CN)_(4) have ratio of sigma and pi bonds same (2) Propanal and propanone have same ratio of sigma and pi bonds (3) CO_(2) and BeF_(2) both are linear and possess sp-hybridisation (4) XeF_(4) and SF_(4) both are square planar and possess sp^(3)d -hybridisation (5) Cl-Cl bond is stronger than Br-Br

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies . The bond angles NO_2^+, NO and NO_2^- are respectivley :

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies . Which are true statements among the following ? (1) I_(3)^(+) has bent structure (2) ppi-dx bons are present in SO_(2) (3) SeF_(4) and CH_(4) has same shape (4) XeF_(2) and CO_(2) has same shape (5) SF_(4) is see-saw structure wherear ICl_(3) is T shaped

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies .. Which statements are correct ? (1) Bond angle of PF_(3) gt PCl_(3) . (2) Bond angle of PCl_(3) lt PBr_(3) (3) (CH_(3))_(3)N is pyramidal whereas (SiH_(3))_(3)N is planar but both shows sp^(3) -hybridisation. (4) Multiple bonds also influence the geometry of molecule and thus C_(2)H_(2) has angleHCH=160^(@) and angleHCO=122^(@) (5) PCl_(5) is super-octet molecule

Lewis concept of covalency of an element involved octet rule .Later on it was found that many elements in their compoinds e.g, BeF_2,BF_3 etc . Have incomplete octet whereas PCl_5 ,SF_6 etc , have expanded octet . This classical conept also failed in predicting the geometry of molecules .Modern concept of covalence was propsed in terms of valence bond theory proposed by Heitler and London and later on modified by Pauling nad Slater . Hybridisation concept alongwith valence bond theory although successfully explained the geometry of various molecules but failed in many molecules . the geometry of such molecules was explained by VSEPR concept . Finally molecular orbital theory was porosed by Hund -Mulliken to explain many other anomalies . Selcet the cirrect statements . (1) Bond order for N_2^+ and N_2^- are same ( 2) Bond energy of N_2^+ lt N_2^- (3) Bond lenght of N_2^+ lt N_2^- (4) C_3 F_4 is a non -palar molecular (5) XeF_2 hat two (F) atoms in axial position whereas XeF_4 has four ( F) atoms in equatiorial position .

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