HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Important Questions for Chemistry

Define terms: Fuel cell

Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction

Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction

Draw the structures of the HClO₃.

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if ∆₀ < P.

What is Lanthanoid contraction?

The following data were obtained during the first order thermal decomposition of SO₂Cl₂ at a constant volume :

SO₂Cl₂ (g) → SO₂ (g) + Cl₂ (g)

Calculate the rate constant.

(Given : log 4 = 0.6021, log 2 = 0.3010)

Account for the following : Nitrogen does not form pentahalide.

State Henry’s law.

Define limiting molar conductivity.

Give reasons for the following:

The transition metals generally form coloured compounds.

Explain the term Antiseptics

Explain the term osmosis.

Explain the term osmosis.

Calculate the e.m.f. of the following cell at 298 K:

Fe(s) | Fe²⁺ (0.001 M) | | H⁺ (0.01 M) | H₂(g) (1 bar) | Pt(s)

Given that \[\ce{E^0_{cell}}\] = 0.44 V

[log 2 = 0.3010, log 3 = 0.4771, log 10 = 1]

Calculate emf of the following cell at 25°C:

\[\ce{Sn/Sn^2+ (0.001 M) || H+ (0.01 M) | H2_{(g)} (1 bar) | Pt_{(s)}}\]

Given: \[\ce{E^\circ(Sn^2+/sn) = -0.14 V, E^\circ H+/H2 = 0.00 V (log 10 = 1)}\]

Define the Standard enthalpy of combustion.

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]²

How is the rate of reaction affected if the concentration of B is doubled?

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]²

What is the overall order of reaction if A is present in large excess?

Distinguish between Order and Molecularity of reaction.