p-Block Flashcards
What orbitals are involved in the pi orbitals in NO3-, PO4(3-)?
p. spd
Borax and kernite difference? Where does borax occur?
10H2O vs 4H2O. Puga Valley (Ladakh), Sambhar Lake (Rajasthan)
Half life of nihonium?
20 seconds
g13 radius order?
Order of electronegativity?
B < Ga < Al < In < Tl
Decreases from B to Al, then increases marginally
Why is gallium useful for measuring high temperature?
High boiling point
Why only p orbitals involved in bonding for higher elements?
inert pair effect
Enaught value for Al3+/Al
Tl3+/Tl
-1.66
+1.26
White fumes appear around the bottle of
anhydrous aluminium chloride. Give
reason.
HCl
Borax contains tetranuclear units?
Na2[B4O5(OH)4]- (learn the structure)
Banana bond angles?
97 and 120
Heat resistant glasses made of boron?
Pyrex
Conductivity of aluminum is ______ that of copper
twice
Half year of C14?
5770 years
The electronegativity from Si to Pb
almost the same
Sn in +2 state is a
reducing agent
Only acidic monoxide? Only g14 element to react with water?
GeO. Tin
SnF4 and PbF4, which are ______ in nature
ionic
Why B mostly covalent
High ionization enthalpy
Lewis acid behaviour ___________ in trivalent state as we go down
decreases
Why BCl3 doesn’t dimerize?
B can’t accomodate 4 Cl
AlCl3 dimer bond angle order?
Bond length order?
Cl-Al-Cl (outer) > Al-Cl-Al > Cl- Al - Cl (inner)
terminal bond smaller
Al is passive to which acid
conc HNO3
no. of sp3 and sp2 in
1. borax
2. boric acid
- 2 sp3, 2 sp2
2. sp2
NABH4 + I2 gives?
diborane
B2H6 forms adducts with?
NMe3, CO
CO is a _____________ agent
reducing
