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?

 

Related Questions:

Why bond angle of hydrides of group 15, decreases down the group?

Why SF6 behave inert towards hydrolysis?

What are the SESQUI OXIDES ? give the examples.

Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].

Why SF6 behave inert towards hydrolysis?

Although Sulphur contain vacant d-orbital but SF6 does not under go hydrolysis. Why ?

Phosphorus can form PCl5 but nitrogen can not form NCl5 why?

Why PCl3 hydrolysed while NCl3 can not be hydrolysed?

CCl4 can not be hydrolysed but SiCl4 can be. Why?

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

When ethanol and acetic acid were mixed together in equimolar proportion 66.6% are converted into ethyl acetate. Calculate KC . Also calculate quantity of ester produced if one mole of acetic acid is treated with 0.5 mole and 4 mole of alcohol respectively.

 

Related Topics and Questions;

CHEMICAL EQUILIBRIUM

EQUILIBRIUM CONSTANT Kp ,Kc AND Kx (LAW OF MASS ACTION)

The vapour density of N2O4 at a certain temperature is 30. The percentage dissociation of N2O4 at this temperature is..

If PCl5 is 80% dissociated at 523 K. Calculate the vapour density of the equilibrium mixture at 523 K

 

If PCl5 is 80% dissociated at 523 K. Calculate the vapour density of the equilibrium mixture at 523 K

 

Related Topics and Questions;

EQUILIBRIUM CONSTANT Kp ,Kc AND Kx (LAW OF MASS ACTION)

The vapour density of N2O4 at a certain temperature is 30. The percentage dissociation of N2O4 at this temperature is..

 

The vapour density of N2O4 at a certain temperature is 30. The percentage dissociation of N2O4 at this temperature is..

 

 

 

Related Topics;

EQUILIBRIUM CONSTANT Kp ,Kc AND Kx (LAW OF MASS ACTION)

 

The energy of activation for a reaction is 100 kJ mol^-1. Presence of a catalyst lowers the energy of activation by 75%. What will be effect on rate of reaction at 20”C, other things being equal ?

 

Related Questions:

What is Arrhenius equation ?

what happen when activation energy of a chemical reaction becomes equal to RT?

What is the activation energy and how to different from threshold energy ?

In Arrhenius equation for a certain reaction, the value of A and Ea (activation energy) are 4 × 10^13 sec–1 and 98.6 kJ mol–1 respectively. At what temperature, the reaction will have specific rate constant 1.1 × 10^–3 sec–1?

The energy of activation for a reaction is 100 kJ mol–1. Presence of a catalyst lowers the energy of activation by 75%.What will be effect on rate of reaction at 20ºC, other things being equal?

A drug becomes ineffective after 30 % decomposition. The original concentration of a sample was 5mg/mL which becomes 4.2 mg/mL during 20 months. Assuming the decomposition of first order , calculate the expiry time of the drug in months. What is the half life of the product?

A first order reaction is 20 % completed in 10 minutes. Calculate the time taken for the reaction to go to 80 % completion. 

The rate of a reaction triple when temperature changes from 20”C to 50”C. Calculate energy of activation for the reaction (R = 8.314 JK^1 mol^1). 

In Arrhenius equation for a certain reaction, the value of A and Ea (activation energy) are 4 x10^13 sec^1 and 98.6 kJ mol1 respectively. At what temperature, the reaction will have specific rate constant 1.1x10^-3 sec^-1 ? 

At 407 K the rate constant of a chemical reaction is 9.5 x10^-5s^-1 and at 420 K, the rate constant is 1.9 x10^-4s^-1. Calculate the frequency factor of the reaction.