Question
Explain in brief aromaticity.

Answer

SELF

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Calculate the pH of the following solutions:
0.3g of Ca(OH)2 dissolved in water to give 500mL of solution.
How would you explain the fact that first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?
What is heat capacity? Write the derivation of relationship between c, and c
  1. Why is HF liquid but HCl, HBr, Hl are gases?
  2. Why is o-nitrophenol steam volatile whereas p-nitrophenol is not steam volatile?
  1. Arrange the following in decreasing order of their bond angle: H2O, NH3, H2S
  2. Sketch the bond moments and resultant dipole moment of the following molecule:

H2O, NH3, NF3 and PCl5

  1. Draw shape of the following molecules on the basis of VSEPR theory:

XeF4 and SF4. (At. No. of Xe = 54, At. No. of S = 16)

The first ionization constant of $H _2 S$ is $9.1 \times 10^{-8}$. Calculate the concentration of $HS ^{-}$ion in its 0.1 M solution. How will this concentration be affected if the solution is 0.1 M in HCl also? If the second dissociation constant of $H _2 S$ is $1.2 \times 10^{-13}$, calculate the concentration of $S ^{2-}$ under both conditions.
What is resonance? Also explain its rules.
The ionization constant of HF, HCOOH and HCN at 298K are 6.8 × 10–4, 1.8 × 10–4 and 4.8 × 10–9 respectively. Calculate the ionization constants of the corresponding conjugate base.
Explain the mechanism of sulphonation and Friedel Crafts reaction.
What does atomic radius and ionic radius really mean to you?
  1. When 20.0g of ammonium nitrate (NH4NO3) is dissolved in 125g of water in a coffee cup calorimeter, the temperature falls from 296.5K to 286.4K. Find the value of q for the calorimeter. (Treat heat capacity of water as the heat capacity of the calorimeter and its contents).
  2. A chemist while studying the properties of gaseous CCl2F2, a chlorofluorocarbon refrigerant, cooled a 1.25g sample at constant atmospheric pressure of 1.0atm from 320K to 293K. During cooling, the sample volume decreased from 274 to 248mL. Calculate $\Delta\text{H}$ and $\Delta\text{U}$ for the chlorofluorocarbon for this process. For CCl2F2, CP = 80.7J/ (mol K).