HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Chemistry

Explain the term Antiseptics

Explain the cleansing action of soaps.

Define Osmosis.

Define Osmosis.

Write the mathematical equation of the first law of thermodynamics for an isochoric process.

Write the mathematical equation of the first law of thermodynamics for an isochoric process.

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.

Three moles of an ideal gas are expanded isothermally from 15 dm³ to 20 dm³ at a constant external pressure of 1.2 bar. Calculate the amount of work in Joules.

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.

Explain pseudo-first-order reaction with an example.

Describe the manufacturing of H₂SO₄ by the contact process.

Elements of group 16 have lower ionization enthalpy values compared to those of group 15 elements. Explain why?

[NiCl₄]²⁻ is paramagnetic, while [Ni(CO)₄] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

Define racemic mixture.

What is ferromagnetism?

Distinguish between crystalline solid and amorphous solid.