Question
Magnetic properties of coordination compounds. Explain in detail.

Answer

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Describe the nucleophilic addition- elimination reactions of carbonyl compounds with reference to their reaction with the following compounds:
(i) Alcohol and thio alcohol
(ii) Ammonia and its derivatives
Describe how does the enthalpy of reaction remain unchanged when a catalyst is used in the reaction.
  1. Complete the following chemical equations for reactions:
i. $\text{MnO}_{4(aq)}^{-}+\text{S}_{2}\text{O}_{3(aq)}^{2-}+\text{H}_{2}\text{O}_{(l)}\rightarrow$
ii. $\text{Cr}_{2}\text{O}^{-}_{7(aq)}+\text{H}_{2}\text{S}_{(g)}+\text{H}^{+}_{(aq)}\rightarrow$
  1. Give an explanation for each of the following, observations:
  1. The gradual decrease in size $($actinoid contraction$)$ from element to element is greater among the .actinoids than that among the lanthanoids $($lanthanoid contraction$).$
  2. The greatest number of oxidation states are exhibited by the members in the middle of a transition series.
  3. With the same d-orbital configuration $(d^4) Cr^{2+}$ ion is a reducing agent but $Mn^{3+}$ ion is an oxidising agent.
$(i). $Illustrate the following reactions giving suitable example in each case:
$a.$ Ammonolysis
$b.$ Coupling reaction
$c.$ Acetylation of amines
$(ii).$ Describe Hinsberg method for the identification of primary, secondary and tertiary amines. Also, write the chemical equations of the reactions involved.
Match the solutions given in Column $I$ and the colours given in Column $II.$
 
Column $I ($Aqueous solution of salt$)$
 
Column $II($Colour$)$
$(i)$ $\ce{FeSO_4.7H_2O}$ $(a)$
Green
$(ii)$ $\ce{NiCl_2.4H_2O}$ $(b)$
Light pink
$(iii)$ $\ce{MnCl_2.4H_2O}$ $(c)$
Blue
$(iv)$ $\ce{CoCl_2.6H_2O}$ $(d)$
Pale green
$(v)$ $\ce{Cu_2Cl_2}$ $(e)$
Pink
 
 
$(f)$
Colourless
Explain the method of preparing haloalkanes by free radical substitution of alkanes.
$(a).$ While giving intravenous injections to the patients, the doctors take utmost care of the concentration of the solution used. Why is it necessary to check the concentration of the solution?
$(b). $ A solution of phenol was obtained by dissolving $2X 10^{-2} \ kg$ of phenol in $1 \ kg$ of benzene. Experimentally it was found to be $73\%$ associated. Calculate the depression in the freezing point recorded.
  1. Name the three major classes of carbohydrates and give an example of each of these classes.
  2. Answer the following:
  1. What type of linkage is responsible for the primary structure of proteins?
  2. Name the location where protein synthesis occurs in our bod.
(a) What is reverse osmosis? How is water purified through it? Explain.
(b) Write the applications of osmosis.
How many mL of 0.1 M HCl are required to react completely with 1 g mixture of $Na _2 CO _3$ and $NaHCO _3$ containing equimolar amounts of both?