Question
Explain different types of oxidation reactions of alkenes with example.

Answer

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Consider the following equilibrium at 2773K
$\text{H}_2(\text{g})+\text{Cl}_2(\text{g})\rightleftharpoons2\text{HCl}(\text{g})$
Initially 0.25M H2 and 0.25MCl2 are introduced into a reaction vessel and the system in allowed to attain equilibrium. At equilibrium the concentrations of H2(g) and Cl2(g) became 0.0314M. Calculate Kc and Kp.
  1. 1.84g of mixture of CaCO3 and MgCO is strongly heated till no further loss of mass takes place. The residue weighs 0.96g. Calculate the percentage composition of the mixture.
  2. What will be the molality of the solution containing 18.25g of HCl gas in 500g of water?
The ionization constant of propanoic acid is 1.32 × 10–5. Calculate the degree of ionization of the acid in its 0.05M solution and also its pH. What will be its degree of ionization if the solution is 0.01M in HCl also?
Match the species in Column I with the type of hybrid orbitals in Column II.
 
Column I
 
Column II
i.
H3O+
a.
Linear
ii.
HC = CH
b.
Angular
iii.
$\text{ClO}^{-}_{2}$
c.
Tetrahedral
iv.
$\text{NH}^{+}_{4}$
d.
Trigonal bipyramidal
 
 
e.
Pyramidal
  1. Consider the following redox reaction that produce electricity in a galvanic cell:
    1. $2\text{Fe}^{3+}+2\text{Cl}^-\xrightarrow{ \ \ \ \ \ \ \ \ \\ }2\text{Fe}^2+\text{Cl}_2\text{(g)}$

    2. $\text{Cd}\text{(s)}+\text{I}_2\xrightarrow{ \ \ \ \ \ \ \ }\text{Cd}^{2+}+2\text{I}^-$

    3. $2\text{Cr}\text{s}+3\text{Cu}^{2+}\xrightarrow{ \ \ \ \ \ \ \\ \ \ }+3\text{Cu}\text{(s)}+2\text{Cr}^{3+}$

Write the anode and cathode reaction for galvanic cell.

  1. Split the following redox reaction into the oxidation and reduction hay reactions:
    1. $\text{Zn}+\text{Cu}^{2+}\xrightarrow{ \ \ \ \ \ \ \ \\}2\text{n}^{2+}+\text{Cu} $

    2. $\text{Sn}^2+2\text{Hg}^+\xrightarrow{ \ \ \ \\ \ \ \ }\text{Sn}^{4+}+\text{Hg}_2^{2+}$

Explain the important aspects of resonance with reference to the $\text{CO}^{2-}_3$− ion.
Attempt any five of the following:
1. What effect does branching of an alkene chain has on its boiling point?
2. What are Arenes?
3. Write IUPAC name of the following: $CH _3\left( CH _2\right)_4 CH \left( CH _2\right)_3 CH _3 CH _2- CH \left( CH _3\right)_2$
4. Why are alkanes called paraffins?
5. State Le chatelier's principle.
6. What is decarboxylation? Give an example.
7. Arrange the following: $HCl , HBr , Hl , HF$ in order of decreasing reactivity towards alkenes.
What is photoelectric effect? State the result of photoelectric effect experiment that could not be explained on the basis of laws of classical physics. Explain this effect on the basis of quantum theory of electromagnetic radiations.
What is the basic difference in approach between the Mendeleev’s Periodic Lawand the Modern Periodic Law?
Express the following in the scientific notation:
  1. 0.0048
  2. 234, 000
  3. 8008
  4. 500.0
  5. 6.0012