Question

Give reasons for the following :
(a) CN⁻ ion is known but CP⁻ ion is not known
(b) NO₂ dimerises to form N₂O₄
(c) ICl is more reactive than I₂.

Answer 1

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Q)

 

Give the reasons for the following : (a) CN−CN− ions is known but CP−CP−ion is not known (b) NO2NO2dimerizes to form N2O4N2O4 (c) ICIICI is more reactive that I2I2



A)

 

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Solution :

(a) Nitrogen being smaller in size forms pπ−pπpπ−pπ multiple bonding with carbon .

So CN−CN− ion is known , but phosphors does not form pπ−pπpπ−pπ bond as it is larger in size .

(b) This is because NO2NO2 is an odd electron molecule and therefore gets dimerized to stable N2O4N2O4

(c) Because ICIICI has less bond dissociation enthalpy than I2