CBSE Guess > Papers > Important Questions > Class XI > 2010 > Chemistry > Chemistry By Mr. Vaibhav Mishra

CBSE CLASS XI

Q. 19. Explain Hydrogen Bonding (its types) with example and its consequences

Q. 20. Balance the following equation by Redox method

Q. 21. Explain the methods for separation of:

1. Napthalene from sand
2. Water from oil
3. Pigments of different colored inks

Q. 22. Explain the Electrochemical cell under following heads:

1. Oxidation half and Reduction half cel
2. Calculation of Eo
3. Salt Bridge and its function

Or

Explain the types of inter molecular forces between:

1. Ethyl alcohol and water
2. Na ion and Chloride ion
3. Iodine molecule

Q. 23. Explain the variation of following periodic properties along the period and down the group:

1. Atomic size
2. Electronegativity
3. Ionization Energy

Q. 24. Write short notes on: a. Adsorption Spectrum b. Pauli's exclusion principle c. Chromatography

Q. 25. Draw the Born Haber Cycle for formation of NaCl or AlCl₃

Q. 26. Predict which of the following quantum numbers are not possible:

Q. 27. Calculate the molarity of solution prepared by mixing of 18.25 gms of HCl in 1 litre. And find out the new molarity if 3.25 gm of HCl is lost and the volume is reduced to 600 ml

Q. 28. Calculate Bond order, arrange on the basis of bond stability and write electronic configuration of :

O₂ , O₂ + and O₂ -1 Or N₂ , N₂ + and N₂ -1

Q. 29. Balance the equation by Ion electron method:

Or

Write short notes on:

1. Reduction and Oxidation
2. Azimuthal Quantum Number
3. Limiting Reagent
4. Accuracy and Precision
5. Molarity
   

Q. 30. Explain the following with reason:

1. Why Nitrogen molecule is unreactive
2. Why the o nitrophenol is more steam volatile than p nitro phenol
3. Why the bond angle in H₂O is 104^o5' whereas in H₂S is 94^o
4. Why all the bonds in PCl₅ are not equivalent
5. Why Xenon forms compounds with Fluorine

Or

State the postulates of Kinetic Theory of gases Write the Vanderwall gas equation and units for a and b constant

Paper By Mr. Vaibhav Mishra
Email Id : [email protected]
Ph No.: 9425809658