Chemistry - Chemistry of Heavier Metals
Exam Duration: 45 Mins Total Questions : 30
By the interaction between FeSO4 solution and acidified KMnO4 solution
- (a)
iron (III) is reduced
- (b)
iron (II) is reduced
- (c)
KMnO4 is oxidised
- (d)
iron (II) is reduced
Cu2+ will have the electronic configuration
- (a)
1s2;2s2;2p6;3s2;3p8;3d10
- (b)
1s2;2s2;2p6;3s2;3p6;3d9;4s1
- (c)
1s2;2s2;2p6;3s2;3p6;3d9
- (d)
1s2;2s2;2p6;3s2;3p6;3d10
When pyrolusite is fused with KOH in presence of Cu,the mass becomes
- (a)
green
- (b)
black
- (c)
red
- (d)
pink
Dichromate ions in alkaline medium exist as
- (a)
CrO3
- (b)
CrO42-
- (c)
Cr4+
- (d)
Cr3+
Which one of the following metal ions is not coloured in aqueous solution ?
- (a)
Fe2+
- (b)
Cu2+
- (c)
Cr3+
- (d)
Zn2+
Which one of the following metal ions is paramagnetic ?
- (a)
Cu+
- (b)
Zn2+
- (c)
Ti3+
- (d)
Sc3+
Blue vitriol is the name of
- (a)
ZnSO4 . 7HO
- (b)
FeSO4 . 7H2O
- (c)
CuSO4 . 5H2O
- (d)
CuSO4 . H2O
Aluminimum is used in metallurgy as a reducing agent for
- (a)
CuO
- (b)
Cr2O3
- (c)
Fe2O3
- (d)
ZnO
CuSO4 is commerically made from Cu scarp by
- (a)
dissolving it in hot conc.H2SO4
- (b)
spraying warm dil. H2SO4
- (c)
heating with sodium sulphate
- (d)
heating with sulphar
The type of iron obtained from blast furance is
- (a)
wrought iron
- (b)
cast iron
- (c)
pig iron
- (d)
mild steel
Soldering alloy contains
- (a)
Pb 50%; Sn 50%
- (b)
Pb 70%; Sn 30%
- (c)
Pb 50%; Sn 30%; Cu 20%
- (d)
Pb 30%; Sn 70%
Which one of the following is the purest form of iron ?
- (a)
pig iron
- (b)
wrought iron
- (c)
steel
- (d)
cast iron
White lead is
- (a)
Pb(OH)2.PbCO3
- (b)
Pb(OH)2.Pb(CH3oo)2
- (c)
Pb(OH)2
- (d)
PbCO3
In the production of iron from Fe2O3 the reducing agent used is
- (a)
CO
- (b)
C
- (c)
AI
- (d)
Cr
The process of concentrating Ag and Au ores is based on their solubility in
- (a)
NH3
- (b)
HCL
- (c)
HNO3
- (d)
KCN
A metal is left exposed to atmosphere for sometimes. It becomes coated with green basic carbonate.The metal must be
- (a)
Ag
- (b)
Cu
- (c)
Al
- (d)
Zn
Which one of the following is not a mineral of silver ?
- (a)
Horn silver
- (b)
Silver glance
- (c)
German silver
- (d)
Ruby silver
Zinc and silver can be separated from each other by
- (a)
heating with conc.NaOH solution
- (b)
treatment with dil.HNO3
- (c)
fractional crystallisation
- (d)
None of the above
When HgSO4 is heated; Which is/ are formed ?
- (a)
HgSO4,Hg
- (b)
SO2
- (c)
O2
- (d)
All of the above
Which of the following statement is false?
- (a)
Tin (IV) chloride is made by dissolving excess of KI solution
- (b)
Mercury (II) iodide dissolve in excess of KI solution
- (c)
Zinc dissolves in hot NaOH solution
- (d)
CO reduce iron (III) oxide to iron
PbCl4 exists but PbBr4 and PBI4 do not because
- (a)
Br and I ions are bigger in size
- (b)
of inability of bromine and iodine to oxidise Pb2+ to Pb4+
- (c)
of more electroposotive nature of bromine and iodine
- (d)
Cl2 is a gas
Copper displaces the metal in the salt solution of
- (a)
AgNO3
- (b)
ZnSO4
- (c)
FeSO4
- (d)
CaCl
Tin amalgam is used for making
- (a)
rollers
- (b)
mirrors
- (c)
cigarette wrapers
- (d)
cans
Red lead Pb3O4 reacts with conc. HNO3 to give
- (a)
Pb2+ and Pb4+
- (b)
Pb2+ and PbO2
- (c)
Pb4+ and PbO
- (d)
PbO and PbO2
Which one of the following is not a white pigment ?
- (a)
lead chromate
- (b)
basic lead carbonate
- (c)
titanium dioxide
- (d)
lithopone
plumbosolvency means dissolving of lead in
- (a)
water
- (b)
acids
- (c)
alkalies
- (d)
organic solvents
Which one of the following cations has the maximum magnetic moment in a weak ligand field ?
- (a)
Cu2+
- (b)
Fe2+
- (c)
Ni2+
- (d)
Co2+
Which is the correct formula for diammine silver chloride ?
- (a)
AgCI.NH3
- (b)
[Ag(NH3)2]CI
- (c)
[Ag(NH4)2]CI
- (d)
[Ag(NH2)3]CI
which one of the following is not a use of mercury ?
- (a)
the preparation of colomel
- (b)
mercury lamps
- (c)
extraction of silver
- (d)
making amalgans
Which of the following oxides will give the metal on heating ?
- (a)
Zno
- (b)
HgO
- (c)
Al2O3
- (d)
TiO2