(T) imparts violet colour (V) Red gas (W) Red ppt.
(W) Red ppt. white ppt.
(U) gas (gives white fumes with HCl)
sublimes on heating Identify (T) to (Z).
The number of moles of acidified KMnO4 required to convert one mole of sulphite ion into sulphate ion is-
N2(g) + 3H2 (g) 2NH3(g) ; Haber's process, Mo is used as -
MO is catalytic promoter & it improves catalytic properties as catalyst
Potash alum is a double salt, its aqueous solution shows the characteristics of-
K2SO4 .Al2(SO4)3.24 H2O + H2O
Cr2O72- 2CrO42-, X and Y are respectively-
Addition of non-metals like B and C to the interstitial sites of a transition metal results the metal-
Interstitial compound results in
(A) hardness increses
(B) Malleability (decreases)
(C) Ductality (decreases)
Mercury is a liquid at 0°C because of-
Weak metallic bond as due to poor shielding of d & f orbital its ionisation energy became high & kernel formation becomes difficult.
CrO3 dissolves in aqueous NaOH to give-
The correct statement(s) about transition elements is/are-
All statements are comeet
[Ni(CO)4], [Fe(CO)5] [Cr(CO)5]
An ornament of gold having 75% of gold, it is of .............. carat.
100% – 24 carat
Solution of MnO4- is purple-coloured due to-
MnO4– has purple colour due to change transfer
The ionisation energies of transition elements are-
Ionisation energies are between s & p-block.
Transition elements having more tendency to form complex than representative elements (s and p-block elements) due to-
Complex pormation α (Zeff = Z –σ) tendency
During estimation of oxalic acid Vs KMnO4, self indicator is-
KMnO4 acts as self indicator.
The metal(s) which does/do not form amalgam is/are-
Fe, Pt Refer metallurgy
Which of the following statements concern with transition metals ?
O.S. different by 1 unit
Correct statement(s) is/are-
The highest oxidation state among transition elements is-
O5 (Xe)4f14 sd6 6s2
A compound of mercury used in cosmetics, in Ayurvedic and Yunani medicines and known as Vermilon is-
Vermilon cantain floulsmelly HgS.
Acidified chromic acid
X and Y are - (blue colour)
X(Blue colour ),X and Y are
CuSO4 + dilH2SO4 → [Cu(H2O)4]SO4
Transition elements are usually characterised by variable oxidation states but Zn does not show this property because of-
Fully pilled d-subshell
Zn →Zn2+ + 2e-
(NH4)2Cr2O7 (Ammonium dichromate) is used in fire works. The green coloured powder blown in air is-
The d-block element which is a liquid at room temperature, having high specific heat, less reactivity than hydrogen and its chloride (MX2) is volatile on heating is-
HgCl2 is volatile is reffered as corrosive sublimate.
Coinage metals show the properties of-
Cu, Ag, Au, are coinage metal used in coin in older days.
Iron becomes passive by..................due to formation of ................
Fe + HNO3 → Fe2O3 + NO2 + H2O
Bayer's reagent used to detect olifinic double bond is-
Cold dilute alkaline KMnO4 is Bayer’s neagent.
Amphoteric oxide(s) is/are-
oxide of Be, Al, Zn, Cr, Pb, Sn, As, are amphoteric
Interstitial compounds are formed by-
Transition element froms intershtial compound.
The transition metal used in X-rays tube is-
Mo is used become of its high melting point.