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• AIPMT 2010 Chemistry

AIPMT 2010 Chemistry

  

Q. 19. The correct order of increasing bond angles in the following species are:

1. 
   
2. 
   
3. 
   
4. 
   

Sol:

The correct order of increasing bond angle is

* In   there are 2 lone pairs of electrons present on the central chlorine atom. Therefore the bond angle in _ is less than 118° which is the bond angle in  which has less number of electrons on chlorine.

Answer : (3)

Q. 20. Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

1. CaSO₄
2. BeSO₄
3. BaSO₄
4. SrSO₄

Sol:

Be⁺² is very small, hence its hydration enthalpy is greater than its lattice Enthalpy      

Correct choice : (2)

Q. 21. Crystal field stabilization energy for high spin d4 octahedral complex is:

1. 
   
2. 
   
3. 
    
4. 
   

Sol:

d4 in high spin octahedral complex

Answer : (4)