“Ammonal” used in bombs is a mixture of
AI + NH4NO3
AI + AI2O2 + B2O3
Ag2O3
AI2O3 + C
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
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 sublimes on heating?
AIF3
AICI3
AIBr3
AII3
Inorganic graphite is
B2O3
BN
B4C
B3N3H6
Group 13 elements exhibit
Only + 3 oxidation state
Only + 1 oxidation state
Both + 1 and + 3 oxidation states
+1, +3 and -3 oxidation states
Alumnium becomes passive in
Conc: HNO3
H2CrO4
HCIO4
All
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
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
