Colour, catalytic and magnetic properties, complexes, interstitial compounds, alloys
- Given below are two statements :Statement I : Ferromagnetism is considered as an extreme form of paramagnetism.Statement II : The number of unpaired electrons in a Cr^2+ ion (Z = 24) is the same as that of a Nd^3+ ion (Z = 60).In the light of the abo… Answer: 3. Statement I is true but Statement II is false Statement I is true: ferromagnetism is the extreme form of paramagnetism (domains a... 1
- Match List - I with List - IIList-I: A. Haber process B. Wacker oxidation C. Wilkinson catalyst D. Ziegler catalystList-II: I. Fe catalyst II. PdCl_2 III. [(PPh_3)_3RhCl] IV. TiCl_4 with Al(CH_3)_3Choose the correct answer from the options given belo… Answer: 3. A-I, B-II, C-III, D-IV Haber process: Fe catalyst (I). Wacker oxidation (ethene to ethanal): PdCl₂ (II). Wilkinson catalyst: [(PP... 1
- 'Spin only' magnetic moment is same for which of the following ions?A. Ti^3+ B. Cr^2+ C. Mn^2+ D. Fe^2+ E. Sc^3+Choose the most appropriate answer from the options given below: Answer: 2. B and D only Key idea: μ=√(n(n+2)) BM, so equal unpaired electrons give equal moment. mathrmTi³⁺ ( d¹ ): 1 mathrmCr²⁺ ( d⁴ ): 4 m... 1
- The calculated spin only magnetic moment of Cr^2+ ion is : Answer: 2. 4.90 BM Spin-only moment: μ=√(n(n+2)) BM, where n is the number of unpaired electrons. Cr (Z=24): 3d⁵4s¹ . mathrmCr²⁺ : 3d⁴ , so... 1