HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Explain the types of buffer solutions.

Write one application of the following buffer:

Citrate buffer

Write one application of the following buffer:

`"HCO"_3^-  + "H"_2"CO"_3`

Write one application of the following buffer:

NH₄OH + NH₄Cl

A buffer solution contains 0.3 mol dm^–3 NH₄OH (K_b = 1.8 × 10^–5) and 0.4 mol dm^–3 NH₄Cl. Calculate pOH of the solution.

_____________ reaction is used to synthesize straight alkyl substituted benzenes.

Addition of sodium bisulphite to ethanol is ____________ type of reaction.

The following compounds will give positive Fehling’s test.

Write the name of the product when ketones react with 1,2-diol in presence of dry HCl.

Write another name of disproportionation reaction?

Write a mathematical expression for Standard Cell Potential.

What is the mass of copper metal produced at cathode during the passage of 2.03 A current through the CuSO₄ solution for 1 hour. Molar mass of Cu = 63.5 g mol^–1.

Derive the relationship between Gibbs energy of cell reaction and cell potential.

Explain haloform reaction with suitable example.

Write a reaction to distinguish acetaldehyde from acetone

Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Tollen’s reagent

Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Phenyl hydrazine

Write the structure of Hinsberg’s reagent.

O₂ molecule is ______.

The number of covalent bonds present in sulfuric acid: