Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions for Chemistry

What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M?

\[\ce{2 ICl(g) ⇌  I2(g) + Cl2(g)}\]; K_C = 0.14

How can domestic waste be used as manure?

For your agricultural field or garden, you have developed a compost producing pit. Discuss the process in the light of bad odour, flies and recycling of wastes for a good produce.

For the following compound, write structural formula and IUPAC name for all possible isomers having the number of a double or triple bond as indicated:

C₄H₈ (one double bond)

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

3,4-Dimethyl-hept-3-ene

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

2-Ethylbut-1-ene 

Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?

What effect does branching of an alkane chain has on its boiling point?

K_p = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C₂H₆ when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium?

\[\ce{C2H6 (g) ⇌ C2H4 (g) + H2 (g)}\]

Describe two important uses of the following quicklime.

Describe the importance of the limestone.

Describe the importance of the cement.

Describe the importance of the plaster of paris.

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?

\[\begin{array}{cc}
\ce{D}\phantom{......}\ce{H}\\
\backslash\phantom{......}/\\
\ce{C = C}\\
\phantom{...}/\phantom{......}\backslash\phantom{...}\\\ce{H}\phantom{.......}\ce{D}
\end{array}\]

\[\begin{array}{cc}
\ce{D}\phantom{......}\ce{D}\\
\backslash\phantom{......}/\\
\ce{C = C}\\
\phantom{...}/\phantom{......}\backslash\phantom{...}\\\ce{H}\phantom{.......}\ce{H}\end{array}\]

Calculate a) ΔG°and b) the equilibrium constant for the formation of NO₂ from NO and O₂ at 298 K

\[\ce{NO(g) + 1/2 O_2 (g) <=> NO_2(g)}\]

where Δ_fG^⊝ (NO₂) = 52.0 kJ/mol

Δ_fG^⊝ (NO) = 87.0 kJ/mol

Δ_fG^⊝ (O₂) = 0 kJ/mol

Does the number of moles of reaction products increase, decrease or remain same when each of the following equilibria is subjected to a decrease in pressure by increasing the volume?

\[\ce{3Fe (s) + 4H2O (g) ⇌ Fe3O4 (s) + 4H2 (g)}\]

Compare the structures of H₂O and H₂O₂.

Predict which of the following reaction will have the appreciable concentration of reactants and products:

1. \[\ce{Cl2 (g) ⇌ 2Cl (g)}\] K_c = 5 ×10^–39
2. \[\ce{Cl2 (g) + 2NO (g) ⇌ 2NOCl (g)}\] K_c = 3.7 × 10⁸
3. \[\ce{Cl2 (g) + 2NO2 (g) ⇌ 2NO2Cl (g)}\] K_c = 1.8

The value of K_c for the reaction 3O₂ (g) ↔ 2O₃ (g) is 2.0 ×10^–50 at 25°C. If the equilibrium concentration of O₂ in the air at 25°C is 1.6 ×10^–2, what is the concentration of O₃?

The reaction, \[\ce{CO(g) + 3H2(g) ↔ CH4(g) + H2O(g)}\] is at equilibrium at 1300 K in a 1L flask. It also contains 0.30 mol of CO, 0.10 mol of H₂ and 0.02 mol of H₂O and an unknown amount of CH₄ in the flask. Determine the concentration of CH₄ in the mixture. The equilibrium constant, K_c for the reaction at the given temperature is 3.90.