Question
Explain why CO2-3 ion cannot be represented by a single Lewis structure. How can it be best represented?
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What is Bond Enthalpy? Discuss in detail.
On the basis of Le Chatelier principle explain how temperature and pressure can be adjusted to increase the yield of ammonia in the following reaction:
$
\begin{aligned}
& N_2(g)+3 H_2(g) \rightleftharpoons 2 NH_3(g) \\
& \Delta H=-92.38 kJmol^{-1}
\end{aligned}
$
What will be the effect of the addition of argon to the above reaction mixture at constant volume?
→$
\begin{aligned}
& N_2(g)+3 H_2(g) \rightleftharpoons 2 NH_3(g) \\
& \Delta H=-92.38 kJmol^{-1}
\end{aligned}
$
What will be the effect of the addition of argon to the above reaction mixture at constant volume?
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.
→Write short note on ionisation constant and ionic product of water.
Explain the different necessary steps to calculate the concentrations of different reactants and products at equilibrium for reversible reaction.
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.
State modern periodic law and explain modern form of periodic table.
- $\text{Cu}|\text{Cu}^{2+}(1\text{M})||\text{Ag}^+(1\text{M})|\text{Ag}$
$\text{E}^0_\frac{\text{Cu}^{2+}}{\text{Cu}}=0.34\text{V}$
$\text{E}^0_\frac{\text{Ag}^+}{\text{Ag}}=+0.80\text{V}$
- Write reaction at anode and cathode.
- Write net cell reaction.
- Calculate e.m.f. of the cell.
- What is meant by E.M.F of cell? How is it measured?
Match the species in Column I with the type of hybrid orbitals in Column II.
| Column I | | Column II | |
| i. | Hydrogen bond | a. | C |
| ii. | Resonance | b. | LiF |
| iii. | Ionic solid | c. | H2 |
| iv. | Covalent solid | d. | HF |
| e. | O3 |
Explain geometrical isomerism with the help of suitable example.