IIT-JEE Exam

In allene (C3H4), the type(s) of hybridisation of the carbon atoms is (are) :

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IIT-JEE Other Question

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [a0 is Bohr radius] : As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is :
(A) Tetraaquadiaminecobalt (III) chloride (B) Tetraaquadiamminecobalt (III) chloride
(C) Diaminetetraaquacoblat (III) chloride (D) Diamminetetraaquacobalt (III) chloride