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Why does the cell voltage of a mercury cell remain constant during its lifetime?
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Explain the following reaction:
Cannizzaro reaction
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Using crystal field theory, write the electronic configuration of d5 ion, if Δ0 > P.
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What is the spectrochemical series?
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What is the difference between a weak field ligand and a strong field ligand?
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What is crystal field splitting energy?
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What happens when methanal undergoes cannizzaro reaction?
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Why tryptophan is an essential amino acid?
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Give reasons:
Mercury cell delivers a constant potential during its life time.
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Which of the following does not give Cannizzaro reaction?
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On the basis of Crystal Field theory, write the electronic configuration for the d5 ion with a strong field ligand for which Δ0 > P.
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A non-volatile solute 'X' (molar mass = 50 g mol−1), when dissolved in 78 g of benzene, reduced its vapour pressure to 90%. Calculate the Mass of X dissolved in the solution.
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On the basis of crystal field theory, write the electronic configuration for the d5 ion with a weak ligand for which Δ0 < P.
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On the basis of crystal field theory, write the electronic configuration for d4 with a strong field ligand for which Δ0 > P.
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Convert the following:
Benzene to m-nitrobenzaldehyde
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Read the passage carefully and answer the questions that follow.
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Crystal field splitting by various ligands Metal complexes show different colours due to d-d transitions. The complex absorbs light of specific wavelength to promote the electron from t2g to eg level. The colour of the complex is due to the transmitted light, which is complementary of the colour absorbed. The wave number of light absorbed by different complexes of Cr ion are given below:
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Answer the following questions:
(a) Out of ligands "A", "B", "C" and "D", which ligand causes maximum crystal field splitting? Why?
OR
Which of the two, “A” or “D” will be a weak field ligand? Why?
(b) Which of the complexes will be violet in colour? [CrA6]3- or [CrB6]3+ and why?
(Given: If 560 - 570 nm of light is absorbed, the colour of the complex observed is violet.)
(c) If the ligands attached to Cr3+ ion in the complexes given in the table above are water, cyanide ion, chloride ion, and ammonia (not in this order).
Identify the ligand, write the formula and IUPAC name of the following:
- [CrA6]3-
- [CrC6]3+
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The vapour pressure of pure water at a certain temperature is 23.80 mm Hg. If 1 mole of a non-volatile non-electrolytic solute is dissolved in 100g water, Calculate the resultant vapour pressure of the solution.
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Write balanced equations for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
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Explain why Grignard reagents should be prepared under anhydrous conditions?
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8 g of glucose, C6H12O6 (Molar Mass = 180 g mol−1) is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil?
(Kb for water = 0.52 K kg mol−1, boiling point of pure water = 373.15 K)
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