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Important topics and Questions of chemical bonding for IIT Advanced exams 2020 !!

(1) Important Topics:

BRIDGE BONDING-MULTI-CENTERED BOND:

BACK BONDING-THEORY:

BENT'S RULE OF HYBRIDISATION:

DRAGO’S RULE:NO NEED OF HYBRIDIZATION:

POLARITY IN BONDS AND DIPOLE MOMENT:

POLARITY AND FAJAN'S RULE:

(2) Important Questions:

The complex formation Tendency of NH3 is wisher than PH3.

What are the structure of CO2 , NO2+ , OCN- , SCN- ?

Why does CO form a coordinate bond?

How can draw the Lewis Structure of CO?

How can describe the bonding in PF5 using hybrid orbital?

What are the Important structure information of Diamond?

Why are bridge head carbocations unstable?

Arrange the silicon halides into decreasing order of Lewis acids Character? SiF3, SiCl3, SiBr3, SiI3

What is d-orbital resonance?

What is conditions for back bonding ?

BCl3 ,BBr3 BI3 and B(Me)3 are electron deficient but do not undergo dimerization why ?

Why some compounds are undergoes dimerization ?

How many 3c-2e bonds and 3c-4e are there in Al2(CH3) 6?

Why are all P-Cl bond lengths equal in PCl3 but different in PCl5?

Are all bonds of If7 equivalent ?. If Not then explain ?

What is the structure of Blue vitriol (CuSO4) .5H2O also represent the H-Bond with water molecules?

What is hybridisation of PCl5 in solid state ?

Why the C-C bond length in graphite is shorter than C-C bond length of diamond?

Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

Why Bond angle of NF3(102 degree) is lesser than in NH3 (107) ? explaine.

Explain C-H bond length of CH4 is longer than C-H bond length of Difloromethan (CH2F2) ?

Which is more acidic Me3C-OH Or Me3Si-OH and why ?

B-F bond length in BF3 is shorter than B-F bond length in (BF4)- why?

Dipole moment of P(CH3)2 (CF)3 is non zero while dipole moment of P(CH3)2(CF3)2 is zero why?

Dipole moment of PCl2F3 is non zero while dipole moment of PCl3F2 is zero why?

What is Banana bond (3C-2e bridge bond) ? Explaine with suitable examples.

What is bridge bond ? explaine 3C-4e bridge bond with suitable examples .

Arrange the silicon halides into decreasing order of Lewis acids Character? SiF3, SiCl3, SiBr3, SiI3

What is the d-Orbital resonance ?

N(CH3)3 is pyramidal while(SiH3)3N is trigonal planer why?

Explain the significance of bond order. Can bond order be used for quantities comparisons of the strengths of chemical bonds?

 

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