CBSE Class 12 Chemistry 2010 Solved Question Paper

CBSE Class 12 Chemistry 2010 Solved Question Paper. 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.Write a feature which will distinguish a metallic solid from an ionic solid. 

2.Define ‘order of a reaction’. 

3.What is an emulsion? 

4.Why does NO₂ dimerise?

5.Give and example of linkage isomerism. 

6. A solution of KOH hydrolyses CH₃ CHClCH₂CH₃ and CH₂CH₂CH₂CH₂Cl.Which one of these is more easily hydrolysed? 

7. Draw the structural formula of 1-phenylpropan-1-one molecule. 

8. Give the IUPAC name of H₂N – CH₂ – CH₂ - CH = CH₂ 

9. Non-ideal solutions exhibit either positive or negative deviations from Raoult’s law. What are these deviations and why are they caused? Explain with one example of each type. 

10. A reaction is of first order in reactant A and of second order in reactant B. How is the rate of this reaction affected when (i) the concentration of B alone is increased to three times (ii) the concentrations of A as well as B are doubled? 2 

11. The rate constant for a reaction of zero order in A is 0.0030 mol L-1 s-1. How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M? 

12. Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? 

13. Explain the following observations: 

(i) Generally there is an increase in density of elements from titanium (Z=22) to copper (Z=29) in the first series of transition elements.

(ii) Transition elements and their compounds are generally found to be good catalysts in chemical reactions.

14. Name the following coordination compounds according to IUPAC system of nomenclature: 

   (i) [Co(NH₃)₄(H₂O)Cl]Cl₂

   (ii) [CrCl₂(en)₂]Cl, (en=ethane – 1,2-diamine)

15. Illustrate the following reactions giving a chemical equation for each: 

   (i) Kolbe’s reaction.

   (ii) Williamson synthesis.

16. How are the following conversions carried out? 

   (i) Benzyl chloride to benzyl alcohol,

   (ii) Methyl magnesium bromide to 2-methylpropan-2-ol. 

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