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

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

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प्रश्न

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

पर्याय

  • \[\ce{Ag2SO4}\]

  • \[\ce{CuF2}\]

  • \[\ce{ZnF2}\]

  • \[\ce{Cu2Cl2}\]

MCQ
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उत्तर

\[\ce{CuF2}\]

Explanation:

\[\ce{Cu^{2+}}\] has 1 unpaired electron in \[\ce{CuF2}\], hence, it is coloured in solid state.

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पाठ 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १०६]

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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 4 | पृष्ठ १०६

संबंधित प्रश्‍न

ln which pair highest oxidation states of transition metals are found:


Account for the following:

E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+.


In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomization of zinc is the lowest, i.e., 126 kJ mol−1. Why?


Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?


What are the characteristics of the transition elements and why are they called transition elements?


How is potassium dichromate prepared from chrome iron ore?


Transition metals with lowest melting point is ______.


Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?


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


When a brown compound of manganese (A) is treated with \[\ce{HCl}\] it gives a gas (B). The gas taken in excess, reacts with \[\ce{NH3}\] to give an explosive compound (C). Identify compounds A, B and C.


When a chromite ore (A) is fused with sodium carbonate in free excess of air and the product is dissolved in water, a yellow solution of compound (B) is obtained. After treatment of this yellow solution with sulphuric acid, compound (C) can be crystallised from the solution. When compound (C) is treated with KCl, orange crystals of compound (D) crystallise out. Identify A to D and also explain the reactions.


Which of the following statements is not correct?


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


Which of the following ions acts as a typical transition metal ion?


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.)


Why are interstitial compounds well known for transition metals?


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


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:

Atomic sizes


Match List-I with List-II.

List-I List-II
A. Haber process I. Fe catalyst
B. Wacker oxidation II. PdCl2
C. Wilkinson catalyst III. [(PPh3)3RhCl]
D. Ziegler catalyst IV. TiCl4 with Al(CH3)3

Choose the correct answer from the options given below:


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