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question_answer1) What are transition metals. Why are they called so?
question_answer2) Write electronic configuration of Cr and Cu.
question_answer3) Zn, Cd and Hg are not regarded as transition metals. Why?
question_answer4) What is the lowest common oxidation state of transition metals?
question_answer5) Second ionisation enthalpy for Cr and Cu is unusually high. Explain.
question_answer6) In which compound transition metals show very low oxidation states?
question_answer7) Define diamagnetism and par magnetism.
question_answer8) What is ferromagnetic substance? Give one example.
question_answer9) Write spin only formula for the calculation of magnetic moment.
question_answer10) Name the catalyst used in contact process for the manufacture of sulphuric acid.
question_answer11) Which catalyst is used in Haber's process?
question_answer12) In which reaction Ni is used as a catalyst?.
question_answer13) What are interstitial compounds?
question_answer14) Name the catalyst which catalyses reaction between iodide and per sulphate ions.
question_answer15) What is an alloy ?
question_answer16) Name an alloy of transition metals with non-transition metals.
question_answer17) Draw the structure of chromate and dichromate ions.
question_answer18) What happens when is heated?
question_answer19) Draw the structure of manganate and permanganate ions.
question_answer20) What happens when potassium permanganate is treated with oxalic acid?
question_answer21) Which transition metal of 3d series exhibits the largest number of oxidation states and why?
question_answer22) Explain why ion is stable in aqueous solution ?
question_answer23) What are inner transition metals ?
question_answer24) What are lanthanoids?
question_answer25) What are actinoids?
question_answer26) How many orbitals are incomplete in inner transition elements?
question_answer27) What is lanthanoid contraction?
question_answer28) The radii of transition metals of 2nd series and 3rd series are very similar why?
question_answer29) Atomic radii of Zr (160 pm) are identical with the radii of Hf (159 pm) Why?
question_answer30) Zr and Hf occur in nature together why?
question_answer31) Separation of Zr and Hf from a mixture is difficult. Explain
question_answer32) The first two ionisation enthalpies of lanthanides are comparable with those of calcium. Explain.
question_answer33) Name the lanthanoids which show very low value of third ionisation enthalpy.
question_answer34) What is mischmetal?
question_answer35) What are the uses of mischmetal?
question_answer36) Which compound is used as phosphors in T.V. screens?
question_answer37) Give one use of mixed oxides of lanthanoids.
question_answer38) Name the actinoid elements from which electron starts filling sub-shell.
question_answer39) Electronic configuration of actinoids are irregular why?
question_answer40) What is actinoid contraction ?
question_answer41) What is the most common oxidation state shown by actinoids?
question_answer42) What is the maximum oxidation state shown by actinoids?
question_answer43) What is the highest oxidation state shown by lanthanoids?
question_answer44) What is the minimum oxidation state shown by lanthanoids?
question_answer45) Name the components of steel.
question_answer46) Name the transition metal compound used in pigment industry.
question_answer47) Which compound of transition metal is used in dry cell?
question_answer48) Name the transition metals used in battery industries.
question_answer49) What are coinage metals? Why are they called so?
question_answer50) What is Ziegler-Natta catalyst?
question_answer51) Name the compound used in Wacker process of oxidation of ethyne to ethanol.
question_answer52) hyne to ethanol.
question_answer53) In which industry AgBr is used?
question_answer54) Complexes of which transition metal are useful in the polymerisation of alkynes?
question_answer55) Transition metals have very high melting points and boiling points why?
question_answer56) Transition metals have very high enthalpies of atomization, Why?
question_answer57) Enthalpies of atomisation of 2nd and 3rd transition series are higher than the corresponding metals of first transition series.
question_answer58) Ionic radii of ions of the same charge decreases progressively with increasing atomic number in a series. Why?
question_answer59) Density of transition metals increases from Ti to Cu.
question_answer60) How do ionisation enthalpy changes along a transition series?
question_answer61) Transition metals show a great variety of oxidation states. Explain.
question_answer62) Explain why Cu has a positive value?
question_answer63) The observed value for Mn, Ni and Zn are more negative than expected. Explain.
question_answer64) Transition metals show highest oxidation state in fluorides and oxides. Why?
question_answer65) is not knowa. Why ?
question_answer66) compounds undergo disproportionate reaction in aqueous solution. Why?
question_answer67) ion is more stable than in aqueous solution. Why?
question_answer68) What is the cause of paramagnetism?
question_answer69) Transition metal compounds are generally coloured, why?
question_answer70) Transition metals form a large number of complex compounds. Give reasons.
question_answer71) Transition metals and their compounds act as catalyst. Why?
question_answer72) Transition metals form alloys readily. Why?
question_answer73) What happens when dichromate ion is dissolved in alkali?
question_answer74) Give two reactions in which potassium dichromate acts as oxidising agent.
question_answer75) Write two important applications of potassium dichromate.
question_answer76) Give two uses of .
question_answer77) Give reasons :. (i)value foris low. (ii)value for for is high. (iii)value for relatively high. (iv) value for relatively low. (v) value for is comparatively low.
question_answer78) How is potassium dichromate prepared? Write equations
question_answer79) How is potassium permanganate prepared in laboratory
question_answer80) How is potassium permanganate manufactured in large scale?
question_answer81) What is the reason of the greater tendency of transition metals to form complex compounds?
question_answer82) What are interstitial compounds? What are their main characteristics.
question_answer83) Explain, why the chemistry of the actinoids is much men complicated?
question_answer84) What is lanthanoid contraction? What are the causes o lanthanoid contraction.
question_answer85) Discuss the consequences of lanthanoid contraction.
question_answer86) Trivalent lanthanoid ions are coloured. Why?
question_answer87) Explain the cause of paramagnetism in Lanthanoid ion;
question_answer88) What is actinoid contraction? What are the causes of actinoid contraction? Actinoid contraction has consequence. Why?
question_answer89) Actinoids show a greater range of oxidation states. Explain
question_answer90) Ionisation enthalpies of actinoids are lower than that of corresponding lanthanoids. Why?
question_answer91) Potassium dichromate is used as primary standard volumetric analysis. Explain.
question_answer92) Calculate equivalent mass of in acidic, basic an neutral medium.
question_answer93) The lanthanides resemble one another more closely. On reasons.
question_answer94) Ce (IV) is a good analytical reagent, why?
question_answer95) Unlike orbitals orbitals can take part in bond formation Explain.
question_answer96) Give reasons for the following. E° value for is higher than those of and.
question_answer97) What is the effect of change in pH on a solution dichromate ion?
question_answer98) Mn (II) shows maximum paramagnetic character amongst the divalent ions of the first transition series.
question_answer99) The lowest oxidation state of manganese is basic while the highest is acidic.
question_answer100) Why do chromium group elements have the highest melting points in their respective series?
question_answer101) Why do transition metals form coloured complexes?
question_answer102) Among transition metals, the highest oxidation state is exhibited in oxoanions of a metal. Explain.
question_answer103) \[C{{e}^{4+}}\] is used as an oxidising agent in volumetric analysis. Why?
question_answer104) \[Z{{n}^{2+}}\] salts are white while \[C{{u}^{2+}}\] salts are blue.
question_answer105) \[Zr\] and \[Hf\] have identical sizes.
question_answer106) Among the lanthanoids, Ce (III) is easily oxidised to Ce (IV). Discuss.
question_answer107) Copper (I) has \[{{d}^{10}}\] configuration while copper (II) has \[{{d}^{9}}\] configuration, still copper (II) is more stable in aqueous solution than copper (I). Assign reason.
question_answer108) With \[3{{d}^{4}}\] configuration, \[C{{r}^{2+}}\] acts as a reducing agent but \[M{{n}^{3+}}\] acts as an oxidising agent. Explain.
question_answer109) The element scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as a transition element. Explain
question_answer110) E° value for the \[M{{n}^{3+}}/M{{n}^{2+}}\] couple is much more positive than for \[C{{r}^{3+}}/C{{r}^{2+}}\] couple. Assign reason.
question_answer111) Why is chemistry of all lanthanoids identical?
question_answer112) On the basis of the standard electrode potential values stated for acid solution, predict whether,\[T{{i}^{4+}}\] species may be used to oxidise \[F{{e}^{II}}\] to \[F{{e}^{III}}\]. Given \[T{{i}^{4+}}+{{e}^{-}}\,\xrightarrow{{}}\,T{{i}^{3+}};\]\[{{E}^{\odot -}}=+0.01\,V;\]\[F{{e}^{3+}}\,+{{e}^{-}}\,\xrightarrow{{}}\,F{{e}^{2+}};\,\]\[{{E}^{\odot -}}=+0.77\,V\].
question_answer113) Out of \[F{{e}^{2+}}\] and \[F{{e}^{3+}}\] ions, which is more stable?
question_answer114) Anhydrous ferric chloride cannot be obtained by heating hydrated ferric chloride. Discuss.
question_answer115) Why is Cu (I) diamagnetic while Cu (II) is paramagnetic?
question_answer116) \[Z{{n}^{2+}}\] salts are white while \[C{{u}^{2+}}\] salts are blue. Explain.
question_answer117) \[C{{u}^{+}}\] is a \[{{d}^{10}}\] ion and colourless whereas \[C{{u}_{2}}O\] is red and \[C{{u}_{2}}S\] is black. Explain.
question_answer118) Out of \[C{{o}^{2+}}\] and \[N{{i}^{2+}}\] ions, which has lower magnetic moment?
question_answer119) Why is ZnO yellow when hot and white when cold?
question_answer120) Transition elements form a number of interstitial compounds. Explain.
question_answer121) Chromium is a typical hard metal while mercury is a liquid. Explain.
question_answer122) Transition metals of 3d-series do not react readily with dilute acids to liberate hydrogen although they have high negative reduction potential values. Assign reason.
question_answer123) The second and third members in each group of the transition elements have similar metallic radii. Assign reason.
question_answer124) The atomic radii of the elements in a transition series do not vary much while they do vary in case of s and p block elements. Explain.
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