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
Alumnium becomes passive in
Conc: HNO3
H2CrO4
HCIO4
All
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
AI2O3 + C
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.
The type of hybridization of boron in diborane is
sp
sp2
sp3
sp3d2
The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
Which of the following statements is correct?
BCI3 and AICI3 are both Lewis acids and BCI3 is stronger than AICI3
BCI3 and AICI3 are both Lewis acids and AICI3 is stronger than AICI3
BCI3 and AICI3 are both equally strong Lewis acids
Both BCI3 and AICI3 are not Lewis acids
Borax is not used
As a styptic to stop bleeding
In making enamel and pottery glazes
As a flux in soldering
In making optical glass
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
