The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
Corundum is
AI2(SO4)3
AI2O3.H2O
AI2O3.2H2O
AI2O3
Anodized aluminium is aluminium
Obtained on anode
Electrolytically coated with aluminium oxide
Alloy of aluminium containing 95% of AI
All of the above
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
B(OH)3 is
Monobasic acid
Dibasic acid
Tribasic acid
Tetra basic
“Ammonal” used in bombs is a mixture of
AI + NH4NO3
AI + AI2O2 + B2O3
Ag2O3
AI2O3 + C
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
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.
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
