Which of the following alkaline earth metal nitrate does not crystalline with water of crystallization?

a) Ca(NO3)2

b) Mg(NO3)2

c) Sr(NO3)2

d) Ba(NO3)2

Answer: (d)

•It depends on the polarization power of cation.

• The atom which is having larger size will have lesser polarization power and does not have water of crystallization.

• Ba 2+ ion is larger in size in comparison to Ca 2+ Mg 2+ and Sr 2+ ion.

• Ba(NO3)2 is the correct option.

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