HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

What is ferromagnetism?

Iron (z=26) is highly ferromagnetic. Explain.

The molecular formula H₂S₂O₂ represents which oxoacid?

• Hydrosulphurous acid
• Thiosulphurous acid
• Sulphuric acid
• Pyrosulphurous acid

Write the molecular formula and structure of dithionic acid.

Write the molecular formula and structures of the peroxy monosulphuric acid.

Write molecular formula and structure of Pyrosulphuric acid 

Write molecular formulae and structures of the Dithionous acid

Write the reactions involved in the preparation of Teflon.

What type of magnetism is shown in the following alignment of magnetic moments?

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

Define the following term:

Ferromagnetism

What are fuel cells?

How are the following conversions carried out?

Benzoic acid into metanitrobenzoic acid.

Define entropy.

State the superiority of crystal field theory over valence bond theory.

Write the molecular and structural formulae of Dithionous acid

Write chemical reaction to prepare the following polymer: Teflon

The standard enthalpy of combustion of formaldehyde Δ₀H⁰ = -571 kJ. How much heat will be evolved in the formation of 22 g of CO₂?

Pyrolusite ore is _______.

A 0.1 m solution of K₂SO₄ in water has a freezing point of –4.3°C. What is the value of van’t Hoff factor if K_f for water is 1.86 K kg mol^–1?