Anodized aluminium is aluminium
Obtained on anode
Electrolytically coated with aluminium oxide
Alloy of aluminium containing 95% of AI
All of the above
Corundum is
AI2(SO4)3
AI2O3.H2O
AI2O3.2H2O
AI2O3
Which of the flowing is most abundant among group 13 elements in the earth’s crust?
B
AI
Ga
In
Borazole is known as
Organic benzene
Organic compound
Inorganic compound
Inorganic benzene
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
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 compounds are formed when BCI3 is treated with water?
H3BO3 + HCI
B2H6 + HCI
B2O3 + HCI
All
Which of the following sublimes on heating?
AIF3
AICI3
AIBr3
AII3
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 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
