CBSE Class 12 Chemistry Question paper 2007 (1)

CBSE Class 12 Chemistry Question paper 2007 (1).Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

1. What is the number of atoms per unit cell in a body centered cubic structure ? 

2. Define osmotic pressure. 

3.Why do nitro compounds have high boiling points in comparison with other compounds of same molecular mass? 

4. State ‘Pauli’s exclusion principle’.Explain giving an example how this principle limits the maximum occupancy of an energy level in an atom. 

OR 

State ‘Aufbau principle’ and give the order in which the energies of orbitals increase and hence they are filled in that order. 

5. Write balanced chemical equations for the following reactions: 

(i) Aluminium dissolves in aqueous hydrochloric acid

 (ii) Tin reacts with a hot alkali solution 

6. Write the structures of the following species: 

(i) H₃PO₂ (ii) H₂SO₅ 

 (i) H₃PO₂ (ii) H₂SO₅ 

7. Write balanced chemical equations for the following reactions : 

(i) Aluminium dissolves in aqueous hydrochloric acid 

(ii) Tin reacts with a hot alkali solution 

8. How would you account for the following : 

(i) Phenols are much more acidic than alcohols. 

(ii) The boiling points of ethers are much lower than those of the alcohols of comparable molar masses. 

9. Draw the structure of the monomer of each of the following polymers : 

(i) Polyvinylchloride (PVC) (ii) Nylon-6

Please click the link below to download pdf file of CBSE Class 12 Chemistry Question paper 2007 (1).