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IIT-JEE-Chemistry-Mains-2003


Mains

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Note : Question number 1 to 10 caries 2 marks each and 11 to 20 carries 4 marks each. 
  
1.         Calculate the molarity of water if its density is 1000 kg/m3. 
  

2.         The average velocity of gas molecules is 400 m/sec. Calculate its rms velocity at the same temperature. 
  

3.         Write down the heterogeneous catalyst involved in the polymerization of ethylene. 
  

4.         Which one is more soluble in diethyl ether anhydrous AICI3 or hydrous AICI3? Explain in terms of bonding. 
  

5.         Using VSEPR theory, draw the shape of PCI5 and BrF5. 
  

6.         A racemic mixture of (+) 2-phenyl propanoic acid on esterification with (+) 
2-butanol gives two esters. Mention the stereochemistry of the two esters produced.
  
7.         Wavelengths of high energy transition of H-atoms is 91.2nm. Calculate the corresponding wavelength of He atoms. 
  

8.         Match the Ka values 
 

 
Ka

 (a) Benzoic acid 
  

 (b) O2N-benzene-ring-COOH 
  
 (c) CI-benzene-ring-COOH 
  
 (d) H3CO-benzene-ring-COOH 
  
 (e) H3C-benzene-ring-COOH 
 
3.3 × 10-5 
  

6.3 × 10-5 
  

30.6 × 10-5 
  

6.4 × 10-5 
  

4.2 × 10-5

  
 

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