Which of the following is most acidic?
N2O5
P2O5
As2O5
Sb2O5
Which one of the following statements about the zeolites is false?
They are used as cation exchangers
They have open structure which enables them to take up small molecules
Zeolites are aluminosilicates having three dimensional network
Some of the SiO units are replaced by AlO and AlO ions in zeolites.
A certain compound (X) when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the ppt. turns white. The compound (X) is
K2CO3
KI
KBr
K3PO4
Which one of the following arrangements does not give the correct picture of the trends indicated against it?
F2 > Cl2 > Br2 > I2 : Oxidising power
F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
F2 > Cl2 > Br2 > I2 : Bond dissocation energy
F2 > Cl2 > Br2 > I2 : Electronegativity
Al2O3 can be converted into anhydrous AlCl3 by heating
Al2O3 with HCl gas
Al2O3 with NaCl in solid state
a mixture of Al2O3 and carbon in dry Cl2 gas
Al2O3 with Cl2gas
Which of the following bonds will be most polar?
N-Cl
O-F
N-F
N-N
Nitrogen is relatively inactive element because
its atom has a stable electronic configuration
it has low atomic radius
its electronegativity is fairly high
dissociation energy of its molecule is fairly high
Oxidation of thiosulphate by iodine gives
tetrathionate ion
sulphide ion
sulphate ion
sulphite ion
It is possible to obtain oxygen from air by fractional distillation because
oxygen is in a different group of the periodic table from nitrogen
oxygen is more reactive than nitrogen
oxygen has higher b.p. than nitrogen
oxygen has a lower density than nitrogen
Glass is a
liquid
solid
supercooled liquid
transparent-organic polymer
