What is the geometry of molecule of bromine penta fluoride?
Square planar
Trigonal bipyramidal
Squre pyramidal
Octahedral
Select a ferromagnetic material from the following.
Dioxygen
Chromium (IV) oxide
Benzene
Dihydrogen monoxide
Which element among the following does form p - p multiple bonds?
Arsenic
Nitrogen
Phosphorus
Antimony
The colour and magnetic nature of manganate ion (MnO) is
green, paramagnetic
purple, diamagnetic
green, diamagnetic
purple, paramagnetic
What is the hybridisation of carbon atoms in fullerene?
sp3
sp
sp2
dsp3
C.
sp2
Fullerenes are the allotropes of carbon also called Buckminster fullerenes. They are cage like spheroidal molecules with general formula, C2n (e.g., C60 , C70 etc).
Each C-atom in C60 is sp2 - hybridised forming o-bonds with three other C-atoms. The fourth electron remains free and responsible for its conductivity.