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
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
AI2O3 + C
Which of the following compounds are formed when BCI3 is treated with water?
H3BO3 + HCI
B2H6 + HCI
B2O3 + HCI
All
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
The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
Which of the flowing is most abundant among group 13 elements in the earth’s crust?
B
AI
Ga
In
Inorganic graphite is
B2O3
BN
B4C
B3N3H6
The blue colored mineral ‘Lapis Lazuli’ which is used as a semiprecious stone is a mineral of the following class
Sodium aluminosilicate
Zinc cobaltate
Basic copper carbonate
All the above
Group 13 elements exhibit
Only + 3 oxidation state
Only + 1 oxidation state
Both + 1 and + 3 oxidation states
+1, +3 and -3 oxidation states
“Ammonal” used in bombs is a mixture of
AI + NH4NO3
AI + AI2O2 + B2O3
Ag2O3