Question
Explain the open chain structure of glucose.

Answer

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Explain the oxidation of primary, secondary and tertiary alcohols.
Answer the following questions: For $M^{2+}/M$ and $M^{3+}/M^{2+}$^ systems, $E^\circ $ values for some metals are as follows:
$Cr^{2+}/Cr = - 0.9 V$ $Cr^{3+}/Cr^{2+} = - 0.4 V$
$Mn^{2+}/Mn = 0 1.2 V$ $Mn^{3+}/Mn^{2+} = +1.5 V$
$Fe^{2+}/Fe = - 0.4 V$ $Fe^{3+}/Fe^{2+} = +0.8 V$
Use this data to comment upon:
  1. The stability of $Fe^{3+}$​​​​​​​^ in acid solution as compared to that of $Cr^{3+}$​​​​​​​^ and $Mn^{3+}.$
  2. The ease with which iron can be oxidised as compared to the similar process for either Cr or Mn metals.
  1. Define the following terms:
  1. Ideal solution.
  2. Azeotrope.
  3. Osmotic pressure.
  1. A solution of glucose $(C_6H_{12}O_6)$ in water is labelled as $10\%$ by weight. What would be the molality of solution?
(Molar mass of glucose = $180 g mol^{-1}$).
Give reasons for the following:
  1. Molten aluminium bromide is poor conductor of electricity.
  2. Nitric oxide becomes brown when released in air.
  3. $PCl_5$​​​​​​​ is ionic in nature in the solid state.
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  5. Sulphur disappears when boiled with an aqueous solution of sodium sulphite.
Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.
  1. Methanal
  2. 2-Methylpentanal
  3. Benzaldehyde
  4. Benzophenone
  5. Cyclohexanone
  6. 1-Phenylpropanone
  7. Phenylacetaldehyde
  8. Butan-1-ol
  9. 2,2-Dimethylbutanal.
a. Amongst the following, the most stable complex is:
i. $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$
ii. $\left[ Fe \left( NH _3\right)_6\right]^{3+}$
iii. $\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}$
iv. $\left[ FeCl _6\right]^{3+}$
b. What will be the correct order for the wavelength of absorption in the visible region for the following:
$
\left[Ni\left(NO_2\right)_6\right]^{4-},\left[Ni\left(NH_3\right)_6\right]^{2+},\left[Ni\left(H_2 O\right)_6\right]^{2+}
$
Match the items of Column I and Column II.
  Column I   Column II
(i) Dialysis. (a) Cleansing action of soap.
(ii) Peptisation. (b) Coagulation.
(iii) Emulsification. (c) Colloidal sol formation.
(iv) Electrophoresis. (d) Purification.
Explain the relationship between basicity and structure of amines.
Describe the common name system and IUPAC system of naming amines.
Answer the following question:Arrange the following in the order of property indicated against each set:
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