Question
Explain valence bond theory for coordination compounds.

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i. $\left[ Cr \left( C _2 O _4\right)_3\right]^{3-}$
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iii. $\left[ Cr \left( NH _3\right)_2 Cl _2( en )\right]^{+}$
Explain the collision principle of any chemical reaction.
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(Kf for CS2 = 3.83 K kg mol–1, Atomic mass of Sulphur = 32 g mol–1]

  1. Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing.
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  1. Give an explanation for each of the following, observations:
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  2. Zn, Cd and Hg are soft metals.
  3. Evalue for the Mn3+/Mn2+ couple is highly

positive (+ 1·57 V) as compared to Cr3+/Cr2+.

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