B(OH)3 is
Monobasic acid
Dibasic acid
Tribasic acid
Tetra basic
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
AI2O3 + C
The type of hybridization of boron in diborane is
sp
sp2
sp3
sp3d2
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.
Borazole is known as
Organic benzene
Organic compound
Inorganic compound
Inorganic benzene
The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
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
Inorganic graphite is
B2O3
BN
B4C
B3N3H6
Which of the flowing is most abundant among group 13 elements in the earth’s crust?
B
AI
Ga
In
Corundum is
AI2(SO4)3
AI2O3.H2O
AI2O3.2H2O