Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight

10.0 ml of 0.05 M KMnO₄ solution was consumed in a titration with 10.0 mL of given oxalic acid dehydrate solution. The strength of given oxalic acid solution is _____ *10⁻² g/L. (Round off to the Nearest Integer).

When 400 mL of 0.2 M H₂SO₄ solution is mixed with 600 mL of of 0.1 M NaOH solution the increase in temperature of the final solution is _____ *10⁻² K. (Round off to the Nearest Integer).
[Use : H⁺(aq) + OH⁻(aq) → H₂O : ΔₙH = –57.1kJmol⁻¹
Specific heat of H₂O = 4.18JK⁻¹g⁻¹
Density of H₂O = 1.0gcm⁻³
Assume no change in volume of solution on mixing]

3 moles of metal complex with formula Co(en)₂Cl₃, gives 3moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is _____. (Round off to the Nearest Integer).

The total number of electrons in all bonding molecular orbitals of O₂⁻ is _____. (Round off to the Nearest Integer).

The dihedral angle in staggered from the Newman projection of 1,1,1,-Trichloro ethane is _____ degree. (Round off to the Nearest Integer).

For the cell Cu(s) | Cu²⁺ (aq)(0.1M) Ag⁺ (aq)(0.01M) | Ag(s)
The cell potential E₁ = 0.3095V
For the cell Cu(s) | Cu²⁺ (aq)(0.01M) Ag⁺ (aq)(0.001M) | Ag(s)
The cell potential = _____ *10⁻² V. (Round off to the Nearest Integer).
[Use : (2.303RT/F) = 0.059 ]

The equilibrium constant for the reaction
A(s) ⇌ M(s) + ½ O₂(g)
ln Kp = 4. At equilibrium, the partial pressure of O₂ is _____ atm. (Round off to the Nearest Integer).

2SO₂(g) + O₂(g) → 2SO₃(g)
The above reaction is carried out in a vessel starting with partial pressure Pso₂ = 250 m bar, Po₂ = 750 m bar and Pso₃ = 0 bar. When the reaction is complete, the total pressure in the reaction vessel is _____ m bar. (Round off to the Nearest Integer).

For the first order reaction A → 2B, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of the reaction is _____ min. (Round off to the Nearest Integer).
[Use : ln2 = 0.69, ln 10 = 2.3 Properties of logarithms : ln x? = y ln x; ln(x/y) = lnx – lny ]

In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is _____ *10⁻². (Round off to the Nearest Integer).