Question
Draw the resonating structure of
1. ozone molecule
2. nitrate ion

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Assuming the water vapor to be a perfect gas, calculate the internal energy change when 1 mol of water at $100^{\circ} C$ and 1 bar pressure is converted to the ice at $0^{\circ} C$. Given the enthalpy of fusion of ice is 6.00 kJ mol1 heat capacity of water is $4.2 J / g ^{\circ} C$.
From where does ozone come in the photochemical smog?
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For the following compound, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
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  1. In the following redox reactions, identify the oxidation and reducing agents:
  1. $\text{H}_3\text{PO}\text{(aq)}+2\text{HgCl}_2+2\text{H}_2\text{O}\text{(aq)}\\ \xrightarrow{ \ \ \ \ }\text{H}_3\text{PO}_4\text{(aq)}+2\text{Hg(l)}+4\text{HCl(aq)}$
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  1. Why does $H_2S$ acts as reducing agent only whereas $SO_2$​​​​​​​ acts as bot oxidant as wells as rductant?
The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.
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  1. 1s, 2s, 3s, 2p
  2. 4s, 3s, 3p, 4d
  3. 5p, 4d, 5d, 4f, 6s
  4. 5f, 6d, 7s, 7p
  1. Based upon the above information, solve the questions given below:
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4d, 4f, 5s, 5p
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5p, 5d, 5f, 6s, 6p
Comment on the thermodynamic stability of NO(g), given$\frac{1}{2}\text{N}_2(\text{g}) + \frac{1}{2}\text{O}_2(\text{g})\xrightarrow{ \ \ \ \ \ \ } \text{NO}_{(\text{g})} \ ; \ \Delta_{\text{r}}\text{H}^\ominus=90\text{kJ} \ \text{mol}^{-1}$
$\text{NO}_2(\text{g}) + \frac{1}{2}\text{O}_2(\text{g})\xrightarrow{ \ \ \ \ \ \ } \text{NO}_2(\text{g}) \ ; \ \Delta_{\text{r}}\text{H}^\ominus=-74\text{kJ} \ \text{mol}^{-1}$
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