Which one one of the following ionic species will impart colour to an aqueous solution?
Ti4+
Cu+
Zn2+
Cr3+
____________ is a blend of metals prepared by mixing the components.
Alloy
Metals
Non metal
Metalloid
CuSO4 when reacts with KGN forms CUCN, which is insoluble in water. It is soluble in water. It is soluble in excess of the following complex
K2[Cu(CN)4]
K3[Cu(CN)4]
Cu(CN)2
Cu[KCu(CN)4]
________ compounds are those which are formed when small atoms like H,C, or N are trapped inside the crystal lattices of metals.
metallic
ionic
co-ordinate
interstitial
Brass is an alloy of copper and
tin
lead
zinc
mercury
________ is used as a catalyst in Haber process.
finely divided iron
vanadium (v) oxide
nickel
copper chloride
Lanthanides are
14 elements in the sixth period (at no = 90 to 103) that are fillings 4 f sub-level
14 elements in the seventh period (at no = 90 to 103) that are filling 5f sub level
14 elements in the sixth period (at no = 58 to 71) that are filling 4f sub-level
14 elements in the seventh period (at no = 58 to 71) that are filing 4f sub- level
v3+ ions are found to be _____in colour
yellow
violet
green
blue
When (NH4)2Cr2O7 is heated, the gas evolved is
N2
NO2
O2
N2O
_____________ element is defined as the one which has incompletely filled d orbitals in its ground state or in any one of its oxidation states.
alkali
alkaline
halogens
transition
