Photographic plates and films have an essential ingredient of
Silver nitrate
Silver bromide
Sodium chloride
Oleic acid
While extracting element from its ore, the ore is grind and leached with dil KCN solution to form the soluble product potassium argentocyanide. The element is
lead
chromium
manganese
silver
When (NH4)2Cr2O7 is heated, the gas evolved is
N2
NO2
O2
N2O
Nitriding is the process of surface hardening of steel by treating it in an atmosphere of
NH3
O3
H2S
The common oxidation states of Ti are
+2,+3
+3,+4
3,-4
+2, +3, +4
K2Cr2O7 on heating with aqueous NaOH gives
CrO2-4
Cr(OH)3
Cr2O2-7
Cr(OH)2
Which one one of the following ionic species will impart colour to an aqueous solution?
Ti4+
Cu+
Zn2+
Cr3+
Copper sulphate dissolve in excess of KCN to give
CuCN
[Cu(CN)4]3-
[Cu(CN)4]2-
Cu(CN)2
The oxidation state of Cr in K2Cr2O7 is
+5
+3
+6
+7
The lanthanide contraction is responsible for the fact that
Zr and Yt have about the same radius
Zr and Nb have similar oxidation state
Zr and Hf have about the same radius
Zr and Zn have the same oxidation state
