Question
Write the structure of important functional group and make a table of their prefixes and suffixes according to IUPAC.

Answer

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The ionization constant of benzoic acid is $6.46 \times 10^{-5}$ and $K _{\text {sp }}$ for silver benzoate is $2.5 \times 10^{-13}$. How many times is silver benzoate more soluble in a buffer of pH 3.19 compared to its solubility in pure water?
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If B-Cl bond has a dipole moment, explain why $BCl_3$ molecule has zero dipole moment.
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  2. How can you prepare baking soda?
  3. Which is having more reducing characteristics out of alkali metals and alkaline earth metals?
  4. Alkaline earth metals impart a characteristic colour to the flame but Be and Mg do not give. Why?
  5. Write balanced equations for the reactions between $Na_2O$ and $CO_2$.
Calculate the concentration of nitric acid in moles per litre in a sample which has a density, $1.41 \mathrm{~g} \mathrm{~mL}^{-1}$ and the mass per cent of nitric acid in it being $69 \%$.
Draw the Lewis structures for the following molecules and ions: $\text{H}_2\text{S},\ \text{SiCl}_4,\ \text{BeF}_2,\ \text{CO}^{2-}_3,\ \ \text{HCOOH}$
Write short note on ionisation constant and ionic product of water.
What is Gibbs energy? How does this explain spontaneity?
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  2. Calculate the standard enthalpy change $(\Delta_\text{r}\text{H}^\theta)$ and standard internal energy change $(\Delta_\text{r}\text{U}^\theta)$ for the following reaction at 300K:
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Standard enthalpy of formation $(\Delta_\text{r}\text{H}^\theta)$ of e n various species are given below:
$\Delta_\text{f}\text{H}^\theta\text{kJ mol}^{-1}: OF_2(g) = 23.0, H_2O(g)= -241.8, HF(g) = -268.6, R = 8.314 JK^{-1}mol^{-1}$.
What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78M?
$2\text{ICI (g)}\rightleftharpoons\text{I}_2\text{ (g) + Cl}_2\text{ (g)};\text{ K}_{\text{c}}=0.14$