B(OH)3 is
Monobasic acid
Dibasic acid
Tribasic acid
Tetra basic
Borazole is known as
Organic benzene
Organic compound
Inorganic compound
Inorganic benzene
Alumina may be converted into anhydrous ALCL3 by
Heating it with conc.HCI
Heating it in a current of dry chlorine
Heating it with rock salt
Mixing it with carbon and heating the mixture in a current of dry chlorine.
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
AI2O3 + C
Inorganic graphite is
B2O3
BN
B4C
B3N3H6
Alumnium becomes passive in
Conc: HNO3
H2CrO4
HCIO4
All
Which of the following is not correct in case of boron nitride, BN?
It is a good insulator
It is hard because in one of the modifications it has diamond (zinc blende) like structure
It shows magnetc properties
It is chemically unreactive
Group 13 elements exhibit
Only + 3 oxidation state
Only + 1 oxidation state
Both + 1 and + 3 oxidation states
+1, +3 and -3 oxidation states
The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of BF3 and NH3
N : tetrahedral, sp3; B : tetrahedral, sp3
N: pyramidal, sp3: B : Pyramidal, sp3
N: pyramidal, sp3; B: planar, sp3
N: Pyramidal, sp3; B ; tetrahedral, sp3
