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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because ______.

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प्रश्न

Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because ______.

विकल्प

  • both belong to d-block.

  • both have same number of electrons.

  • both have similar atomic radius.

  • both belong to the same group of the periodic table.

MCQ
रिक्त स्थान भरें
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उत्तर

Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because both have similar atomic radius.

Explanation:

Zirconium and hafnium have similar atomic radius hence they show similar physical and chemical properties.

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अध्याय 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १०९]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 20 | पृष्ठ १०९

संबंधित प्रश्न

Why +2 oxidation state of manganese is more stable?


Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with iodide.


Use Hund’s rule to derive the electronic configuration of Ce3+ ion and calculate its magnetic moment on the basis of ‘spin-only’ formula.


Why do transition metal ions possess a great tendency to form complexes?


Two metallic elements A and B have the following standard oxidation potentials: A = 0·40v B = - 0·80v. What would you expect if element A was added to an aqueous salt solution of element B? Give a reason for your answer.


Maximum oxidation state is shown by ____________.


Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid-state?


Which of the following will not act as oxidising agents?

(i) \[\ce{CrO3}\]

(ii) \[\ce{MoO3}\]

(iii) \[\ce{WO3}\]

(iv) \[\ce{CrO^{2-}4}\]


The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?


Match the solutions given in Column I and the colours given in Column II.

Column I
(Aqueous solution of salt)
Column II
(Colour)
(i) \[\ce{FeSO2.7H2O}\] (a) Green
(ii) \[\ce{NiCl2.4H2O}\] (b) Light pink
(iii) \[\ce{MnCl2.4H2O}\] (c) Blue
(iv) \[\ce{CoC12,6H2O}\] (d) Pale green
(v) \[\ce{Cu2 Cl2}\] (e) Pink
  (f) Colourless

Match the properties given in Column I with the metals given in Column II.

  Column I (Property) Column II (Metal)
(i) Element with highest second
ionisation enthalpy
(a) \[\ce{Co}\]
(ii) Element with highest
third ionisation enthalpy
(b) \[\ce{Cr}\]
(iii) \[\ce{M}\] in \[\ce{M(CO)6}\] is (c) \[\ce{Cu}\]
(iv) Element with highest heat
of atomisation
(d) \[\ce{Zn}\]
    (e) \[\ce{Ni}\]

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Transition metals and most of their compounds show paramagnetic behaviour.


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\[\ce{3MnO^{2-}4 + 4H^+ -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + 2H2O}\]


Consider the following standard electrode potential values:

\[\ce{Fe^{3+}_{ (aq)} + e^- -> Fe^{2+}_{ (aq)}}\], E0 = +0.77 V

\[\ce{MnO^{-4}_{ (aq)} + 8H^+ + 5e^- -> Mn^{2+}_{ (aq)} + 4H2O_{(l)}}\], E0 = +1.51 V

What is the cell potential for the redox reaction?


A pair of coloured ions is ______.


Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:

Ionisation enthalpies


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