HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Classify the following species into Lewis acids and Lewis bases.

Explain the types of buffer solutions.

Derive the equation which implies that the degree of dissociation of weak acid is inversely proportional to the square root of its concentration.

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.

Derive the equation p^H + p^OH = 14.

Distinguish between strong electrolyte and weak electrolyte.

The pH of 0.001 M HCl solution is ______.

Calculate the pH of buffer solution composed of 0.01 M weak base BOH and 0.02 M of its salt BA. [K_b = 1.8 × 10^–5 for weak base]

Name one amphoteric solvent.

The pH of a weak monoacidic base is 11.2, and its OH^– ion concentration is ______.

Define Acidic buffer solution.

A weak monobasic acid is 10% dissociated in 0.05 M solution. What is the percent dissociation in 0.15 M solution?

Define conjugate acid-base pair.

Write any four applications of buffer solution.

Vinegar contains ______ acid.

Explain buffer action of sodium acetate-acetic acid buffer.

Define acids according to Bronsted-Lowry theory.

Define “Molar conductivity”.

On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be

• 1
• 2
• 3
• 4

The charge of how many coulomb is required to deposit 1.0 g of sodium metal (molar mass 23.0 g mol^-1) from sodium ions is -

1. 2098
2. 96500
3. 193000
4. 4196