Short Answer TypeOn the basis of crystal field theory, write the electronic configuration for d4 ion if ∆o < P ?
Write the hybridization and magnetic behaviour of the complex [Ni(CO)4].
(At.no. of Ni = 28)
Calculate emf of the following cell at 25 °C:
Fe | Fe2+(0.001 M) || H+ (0.01 M) | H2 (g) (1 bar) | Pt(s)
E°(Fe2+ | Fe) = –0.44 V E°(H+ | H2 ) = 0.00 V
Give reasons for the following observations:
Lyophilic sol is more stable than a lyophobic sol.
Give reasons for the following observations:
It is necessary to remove CO when ammonia is prepared by Haber's process.
3.9 g of benzoic acid dissolved in 49 g of benzene shows a depression in freezing point of 1.62 K. Calculate the van't Hoff factor and predict the nature of solute (associated or dissociated).
(Given: Molar mass of benzoic acid = 122 g mol-1, Kf for benzene = 4.9 K kg mol-1
Indicate the principle behind the method used for the refining of zinc.
Zinc is refined using electrolytic refining process. In this process, pure zinc is transported to cathode from the impure sample at the anode. The more basic metal remains in the electrolytic solution and the less basic metals, present as impurities, precipitate as anode mud.
|
Electrode |
Chemical Reaction |
|
Anode |
Zn Zn2+ +2e - |
|
Cathode |
Zn2+ 2e- + Zn |
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