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Urgent As Chemistry Questions!!!

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Light:
the first ques: Cl2 can be made into 3 fragments :35Cl35CL,35Cl37Cl,37Cl37Cl.
2nd ques:u have to follow pauli exclusion rule and hunds rule.the electrons has be filled singly first in one direction and in increasing energy level..A and C is out due to the double pair but there still empty orbital.it cannot happen as the second electron can pair only when the orbital  is occupied singly.D is the excited state (perhaps of hybridisation)so high energy level.B is correct ans.
 3rd ques not need equation.u compare the  double bonds of reactants and product.1 double bond require 1 mol of H2.U will see 5 double bond undergoes hydrogenation.so 5 mol of H2.

mousa:

--- Quote from: Light on November 27, 2009, 12:49:21 am ---the first ques: Cl2 can be made into 3 fragments :35Cl35CL,35Cl37Cl,37Cl37Cl.
2nd ques:u have to follow pauli exclusion rule and hunds rule.the electrons has be filled singly first in one direction and in increasing energy level..A and C is out due to the double pair but there still empty orbital.it cannot happen as the second electron can pair only when the orbital  is occupied singly.D is the excited state (perhaps of hybridisation)so high energy level.B is correct ans.
 3rd ques not need equation.u compare the  double bonds of reactants and product.1 double bond require 1 mol of H2.U will see 5 double bond undergoes hydrogenation.so 5 mol of H2.

--- End quote ---

Thanks alot lighty..

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