Question
Explain the IUPAC method of nomenclature coordination compounds with examples.

Answer

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Match the terms given in Column I with expressions given in Column II.
  Column I
  Column II
i. Mass percentage
a. $\frac{\text{Number of moles of the solute component}}{\text{Volume of solution in litres}}$
ii. Volume percentage
b. $\frac{\text{Number of moles of a component}}{\text{Total number of moles of all the components}}$
iii. Mole fraction
c. $\frac{\text{Volume of the solute component in solution}}{\text{Total volume of solution}}\times100$
iv. Molality
d. $\frac{\text{Mass of the solute component in solution}}{\text{Total mass of the solution}}\times100$
v. Molarity
e. $\frac{\text{Number of moles of the solute components}}{\text{Mass of solvent in kilograms}}$
Discuss in detail DNA and RNA.
  1. 30 g of urea (M = 60 g mol-1) is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23.8 mm Hg.
  2. Write two differences between ideal solutions and non-ideal solutions.
Describe the reactions of carboxylic acids in which C-OH bond is broken.
  1. Complete the following chemical equations:
  1. $\text{Cr}_{2}\text{O}_{7}^{2-}\text{(aq)}+\text{H}_{2}\text{S}\text{(g)}+\text{H}^{+}\text{(aq)}\rightarrow$
  2. $\text{Cu}^{2+}\text{(aq)}+\text{I}^{-}\text{(aq)}\rightarrow$
  1. How would you account for the following:
  1. The oxidising power of oxoanions are in the order VO+2 < Cr2O2–7 <MnO4.
  2. The third ionisation enthalpy of manganese (Z = 25) is exceptionally high.
  3. Cr2+ is a stronger reducing agent than Fe2+.
  1. State two main differences between globular proteins and fibrous proteins.
  2. Based on their chemical composition, state how are lipids classified Give one example of each class.
Explain the following :
(i) Fermentation
(ii) Dehydration
(iii) Hydrogen bonding in alcohols.
Why is the mass determined by measuring a colligative property in case of some solutes abnormal? Discuss it with the help of Van’t Hoff factor.
Answer the following question:
Write mechanism of the reaction of HI with methoxymethane.
The rate constant for the decomposition of N2O5 at various temperatures is given below:
T/°C 0 20 40 60 80
105 × k/s-1 0.0787 1.70 25.7 178 2140
Draw a graph between ln k and 1/T and calculate the values of A and Ea. Predict the rate constant at 30° and 50°C.