HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Give the structures of Thiosulphuric acid and Peroxy monosulphuric acid.

Write structural formulae for:

p-Nitrophenol

Write structural formulae for:

Salicylic acid

Graphite is a ______.

Define the role of safer chemistry in accident prevention.

Fluorine has higher electronegativity but less electron gain enthalpy. Explain.

Define conjugate acid-base pair.

What are the limitations of Arrhenium theory?

Why do actinoids show variable oxidation states?

What is an elementary reaction?

Scandium shows only two oxidation states. Explain.

The incomplete d-series is ______.

Name the compound which reacts with formaldehyde to produce ethyl alcohol.

How will you convert acetonitrile to ethylamine?

Define the term Protein.

Explain the following laboratory method for the preparation of dioxygen:

Thermal decomposition of metal oxides

Explain the following laboratory method for the preparation of dioxygen:

Thermal decomposition of hydrogen peroxide.

Obtain a relation, `k_2/k_1 = ((t_(1/2))_2)/((t_(1/2))_1)`, where k₁ and k₂ are rate constants while (t_1/2)₁  and  (t_1/2)₂  are half-life periods of the first order reaction at temperatures T₁ and T₂ respectively. Write the relation for activation energy.

Define coordination sphere. Give example.

What is the action of 2,4-Dinitrophenylhydrazine on Acetaldehyde?