11th Chemistry - Important Question's

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Chapter 1 : Basic Concepts of Chemistry  :-


1.  Calculate mass in grams of  a)  An atom of Sulphur.  b)  A molecule of H2O .
2.  How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different.
3.  What is law of multiple proportion ? 

4.  Calculate the molecular formula of an oxide of Fe contain 69.9g and 30.1g of Fe and O respectively in percentage mass.  ( Molar mass of oxide = 159.8 g/mol and Fe = 55.85 ,   O = 16.00  )

5.  What Will be mass of 01 Mole NaCl and  02 Mole of H²O. 

6. Law of Definite Proportion.
7. What is average atomic Mass and atomic Mass Unit .
    Explain Avagadro number.
8. In three moles of ethane ( C2 H6) . Calculate number of moles of carbon atoms and hydrogen atoms .
9. Calculate the molecular formula of an oxide of iron contains 69.9 g and 30.1 gram of fe and o respectively in mass percentage. ( Molar mass of Oxide = 159.8g/mol and Atomic mass Fe = 55.8 and O = 16 )
10. Calculate the mass percentage of different elements in ethyl alcohol ( C2H5OH ).



Chapter 2:  Structure of Atom :-


1.  What is dual nature of substance ?  Establish De-Broglie equation. 
2.  What are Quantum Number ? Explain its type in details .
3.  What is Spectrum ? Different types of spectrum  .
4. What is Pauli's Exclusion Principle . Write it's two Application .
5. Explain Heisenberg  uncertainty Principle. 
6. Rutherford Alpha Particle Scattering Experiment .
7. Calculate energy of one mole of photons of Radiation whose frequency is 5×10¹⁴ Hz.
8. Explain emission and absorption spectra .


Chapter 3 : Classification of Elements and Periodicity in Properties :-


1.  Why Electron Affinity of Be and Mg is Zero. 

2.  Explain why are cations smaller and anions larger in radii than their parent atoms. 

3.  What are Isoelectronic Species . Give Example

4.  Instead of having Similar electronic configuration Mg+ ion has a smaller Size than O²- ion.  Why.? 

5.  What is electronegativity  ? What is Periodicity of electron affinity and electronegativity in a group and series. 

6.  What are. a) Lanthanides.  b)  Amphoteric Oxides.  c) Ionisation Potential 

7. Explain Periodic trends in Ionisation Enthalpy ?


Chapter - 4: Chemical Bonding and Molecular Structure :-


1.  Explain  sp2 hybridization giving example . What is type of hybridisation in Ethylene.

2.  On Basis of Molecular Orbital theory draw the energy level diagram of N² and O² molecule,  also write Bond order and magnetic behaviour.  

3.  On Basis of MOT,  Explain why Be² molecule does not exist. 

4.  Explain Bond Length , Bond angle and Bond Enthalpy .

5.  Calculate No.  of Sigma and Pie Bonds in :  a)  C²H²   and.  B)  C2H4 .

6.  Compare Magnetic Behaviour of the following  :  O², O²- , O²+  .
7. What is dipole moment ? Explain Polar Covalent bonds.

Chapter - 6 : Chemical Thermodynamics :-


1.  What is molar heat Capacity.  It's SI unit. 

2.  Explain Heat of combustion and write it's application. 

3.  What is Heat Capacity :
      Prove that:  Cp - Cv = R .

4.  What is free energy  ?  At Constant temperature and constant pressure prove that  : ∆G = ∆H - T∆S .

5.  What is first law of thermodynamics. Give it's mathematical expression.

6. Define the term  a) Adiabatic Process
    B) entropy. C) Isochoric Process ?

7. Exothermic and Endothermic Reaction .

8. Explain Spontaneity and Entropy .


Chapter - 7 : Equilibrium :-

1.  What is meant by Lewis Acid and Lewis Base ? In H2O , BF3, H+, NH4+ which is Lewis acid .

2.  What is Lechateliers principle ? By the help of it, Explain the effect of temperature ,pressure And concentration on the following reaction
 N2 +3H2↔2NH3, ∆H= - 92Kcal.

3.   What is Commen ion effect ? Explain with Suitable example .

4.  Explain Conjugate acid and Conjugate Base .

5.  Explain the Bronsted- Lowry concept of Acid and Bases with Example .

6.  Establish Relationship between Kp and Kc .

Chapter - 8 : Redox Reaction :-


1.  Write the definition of oxidation and Reduction on the Basis of Oxidation number  .

2.  What are Oxidising agents and What are Reducing agents. 

3.  Discuss Disproportionate Reaction in brief . Why chlorine doesn't shows disproportionate reaction .

4. Write the factor affecting electrode potential.

5.  What is Nernst Equation ? Explain Relationship between E and E° .

6. What is standard hydrogen electrode ? How is it Used ? State the importance of E° .


Chapter 12 : Organic Chemistry - Basic Principles and Techniques : -

1.  What is the meaning of Hyperconjugation. ? Discuss .

2.  What is Inductive Effect , Explain it's type and Application .

3.  What are Electrophiles and nucleophiles ? Explain with Examples. 

4.  Draw the structure of  a)  2MethylPropanol
                                         b) Butanoic Acid
                                      c)  Cyclohexanol



Chapter - 13 : Hydrocarbons :-


1.  What is PVC  ? Write it's Use .

2.  What is Markownikoff's rule ? Give an example and Explain the mechanism .

3.  Draw the structure of following compound  
   a)  2,2 - dimethyl Butane. 
  b)  2 - chloro pentanoic acid 
  c)  1,3 - diamino propane .

4.  Why CycloPropane is more Reactive than cyclohexane .

5. Explain substitution reaction in alkane. 

6. What is Aromatisation ?

7. Explain hybridization in ethylene.


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