Aqueous solution of ferric chloride is acidic due to
ionization
polarization
dissociation
hydrolysis
The correct order of heat of formation of halogen acids is
HI > HBr > HCl > HF
HF > HCl > HBr > HI
HCl > HF > HBr > HI
HCl > HBr > HF > HI
Precipitate of AgCl is soluble in liquid NH3 the compound forms
Ag(NH4)2OH
Ag(NH4)2Cl
Ag(NH3)2OH
Ag(NH3)2Cl
In qualitative analysis, in III group NH4Cl is added before NH4OH because
to increase the concentration of NH ions
to increase the concentration of Cl- ions
to reduce the concentration of OH- ions
to increase the concentration of OH- ions
Which of the following contains greatest number of oxygen atoms ?
1 g of O
1 g of O2
1 g of O3
All have the same number of atoms
Bleaching powder is obtained by the interaction of chlorine with
concentrated solution of calcium hydroxide
dilute solution of calcium hydroxide
dry calcium oxide
dry slaked lime
The formula of haematite is
Fe3O4
Fe2O3
FeCO3
FeS2
B.
Fe2O3
Formula | Name |
Fe3O4 | Magnetite |
Fe2O3 | Haematite |
FeCO3 | Siderite |
FeS2 | Pyrite |
Hypo is used in photography due to its
reaction with light
reducing property
oxidising property
complex forming nature