A metal is left exposed to the atmosphere for some time. It becomes coated with green basic carbonate. The metal must be
1.Nickel
2.Chromium
3.Copper
4.Zinc.
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Among d-block elements the most abundant element belongs to the
1.first transition series
2.second transition series
3.third transition series
4.fourth transition series.
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Among transition elements the elements the element with lowest melting point belongs to group 3
1.3
2.11
3.6
4.12
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Brass is an alloy of
1.Silver and copper
2.Copper and zinc
3.Copper and tin
4.Copper zinc and tin.
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Colour in transition metal compounds is attributed to
1.small size metal ions
2.absorption of light in UV region
3.Complete (n s) subshell
4.Incomplete (n - 1) d subshell.
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hich transition metal shows lowest oxidation state in its compounds with chlorine?
1.Fe
2.Ti
3.Cu
4.Zn.
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In the first transition series the element with highest melting point is
1.Mn
2.Fe
3.Cr
4.Cu.
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Paramagnetism is a property of
1. completely filled electronic sub-shells
2.unpaired electrons
3.non-transition elements
4.elements with noble gas configuration.
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Pyrolusite is an ore of
1.Scandium
2.Titanium
3.Manganese
4.Chromium.
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The 3d metals ions are generally paramagnetic in nature because
1.They form coloured salts
2.They have one or more unpaired d-electrons
3.They have one or more paired s-electrons
4.They are reducing agents.
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The first man-made element belongs to ..?. Transition series
1.3d
2.4d
3.5d
4.6d
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The first man-made element is
1.Iron
2.Technetium
3.Zirconium
4.Mercury.
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The last element of the third transition series is
1.Ag
2.Hg
3.Cd
4.Au.
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The metal present in vitamin B-12 is
1.Copper
2.Iron
3.Cobalt
4.Zinc.
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The metal used for galvanization of iron sheets is
1.Nickel
2.Zinc
3.Chromium
4.Aluminium.
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The most abundant transition element is
1.Copper
2.Aluminium
3.Zinc.
4.None of them
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The most pure form of iron is
1.White cast iron
2.Grey cast iron
3.Wrought iron
4.Steel.
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Transuranic elements begin with
1.Np
2.Cm
3.Pu
4.U.
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Which element among the lanthanides has the smallest atomic radius?
1.Cerium
2.Lutetium
3.Europium
4.Gadolinium.
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Which is the first man-made element?
1.Sc
2.Os
3.Tc
4.Zr.
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Which metal has the highest melting point?
1.Platinum
2.Gold
3.Osmium
4. Tungsten.
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Which of the following dissolves in hot conc. NaOH solution Fe
1.Fe
2.Cu
3.Ag
4.Zn.
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Which of the following does not form coloured complexes?
1.Ni (II)
2.Cu (I)
3.Fe (II)
4.Cr (VI).
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Which of the following element is not resistant to corrosion?
1.Co
2.Fe
3.Ni
4.Au.
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Which of the following elements belongs to actinide series?
1.La
2.Gd
3.Lu
4.Th.
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Which of the following is a condition for complex salt formation?
1.Small size
2.Higher nuclear charge
3.Availability of vacant d-orbitals
4.All of the above.
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Which of the following metals is used in incandescent lamps?
1.Chromium
2.Tungsten
3.Zirconium
4.Molybdenum.
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Which of the following oxides is amphoteric in mature?
1.FeO
2.NiO
3.CoO
4.ZnO.
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Which of the following statements concerning transition elements is not true? They easily form complexes Compounds containing their ions are coloured
1.They are all metals
2.second transition series
3.They easily form complexesCompounds containing their ions are coloured
4.They show multiple oxidation states always differing by two units.
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Which of the following sulphides is yellow in colour?
1.ZnS
2.NiS
3.CdS
4.MgS.
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Which of the following triads is an example of transition elements?
1.Ba Sr Ca
2.Rb Cs Fr
3.Sc Ti V
4.F Cl Br.
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Which one of the following does not show different oxidation states?
1.Iron
2.Copper
3.Zinc
4.Manganese.
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Which one of the following metals is used as a catalyst in the Habers process? Molybdenum
1.Tungsten
2.Molybdenum
3.Chromium
4.Molybdenum
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Which transition metal has lowest density ?
1.Sc
2.Ti
3.Zn
4.La.
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Which transition metal has the lowest density?
1.Os
2.Zn
3.Sc
4.La.
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Which transition metal is known as Wonder metal?
1.Tungsten
2.Platinum
3.Iron
4.Titanium.
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