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Which of the following statements is/are correct ? 

(A)  NH2+  shows  sp2 - hybridisation whereas NH2- shows sp3 - hybridisation 

(B) Al(OH)4- has a regular tetrahedral geometry 

(C) sp2 - hybridized orbitals have equal s- and p- character 

(D) Usually hybridized orbitals form  σ - bonds

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(A) NH2+ shows sp2 - hybridisation whereas  NH2- shows sp3 - hybridisation

(B)  Al(OH)4- has a regular tetrahedral geometry

(D) Usually hybridized orbitals form  σ  - bonds

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