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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 ______.

पर्याय

  • 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
रिकाम्या जागा भरा
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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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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 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
पाठ 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 20 | पृष्ठ १०९

संबंधित प्रश्‍न

Why is Sc3+ colourless while Ti3+ coloured? (Atomic number Sc = 21, Ti =22)


Why do interstitial compounds have higher melting points than corresponding pure metals?


How would you account for the following : Transition metals form coloured compounds


Account for the following:

Zn is not considered as a transition element.


Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?


Calculate the ‘spin only’ magnetic moment of \[\ce{M^{2+}_{( aq)}}\] ion (Z = 27).


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


Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?


The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?


Match the catalysts given in Column I with the processes given in Column II.

Column I (Catalyst) Column II (Process)
(i) \[\ce{Ni}\] in the presence of hydrogen (a) Zieglar Natta catalyst
(ii) \[\ce{Cu2C12}\] (b) Contact process
(iii) \[\ce{V2O5}\] (c) Vegetable oil to ghee
(iv) Finely divided iron (d) Sandmeyer reaction
(v) \[\ce{TiCl4 + Al (CH3)3}\] (e) Haber's Process
  (f) Decomposition of KCIO3

Assertion (A): Cu cannot liberate hydrogen from acids.

Reason (R): Because it has positive electrode potential.


The product of oxidation of I with \[\ce{MnO^{-}4}\] in alkaline medium is:-


Give reason for the following statement:

[Ti(H2O)]3+ is coloured while [Sc(H2O)6]3+ is colourless.


Which one among the following metals of the 3d series has the lowest melting point?


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?


Write the number of unpaired electrons in Cr3+.
(Atomic number of Cr = 24)


In order to protect iron from corrosion, which one will you prefer as a sacrificial electrode, Ni or Zn? Why? (Given standard electrode potentials of Ni, Fe and Zn are -0.25 V, -0.44 V and -0.76 V respectively.)


Write the ionic equation for reaction of KI with acidified KMnO4.


The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.


Give a reason for the following:

Zinc, cadmium and mercury are considered as d-block elements but not regarded as transition elements.


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