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

Answer the following

Give the full form (long form) of the name for the following instrument.

SEM

Answer the following in one sentence :

Classify the following buffers into different types :

NH₄OH + NH₄Cl

Answer the following in one sentence :

Classify the following buffers into different types :

Sodium benzoate + benzoic acid

Answer the following in one sentence :

Classify the following buffers into different types :

Cu(OH)₂ + CuCl₂

Explain with diagram, the vacancy defect.

How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.

Give the classification of stoichiometric point defects.

What is a substitutional impurity defect?

Explain solid solutions of metals and vacancy through aliovalent cations.

Which of the following statements is applicable for 0.1 M urea solution and 0.1 M sucrose solution?

What are hypertonic solutions?

When 50 g of a nonvolatile solute is dissolved in a certain quantity of solvent, the elevation of boiling point is 2.0 K. What will be the elevation of a boiling point when 30 g of solute is dissolved in the same amount of the same solvent?

Derive the expression for molar mass of solute in terms of boiling point elevation of solvent.

Explain the osmotic pressure of a solution with the help of a thistle tube.

Explain the phenomenon of osmosis.

A solution containing 3 g of solute A (M = 60 g/mol) in 1 L solution is isotonic with a solution containing 8.55 g of solute B in 500 mL solution. What is the molar mass of B?

In biochemical system, pH of blood in our body is maintained due to the following buffer:

The pK_b of weak base BOH [K_b(BOH) = 1 × 10^-5] will be ______.

Name the buffer which is used to maintained pH of 8 to 10 for precipitation of cations III A group in qualitative analysis.

Write the formula to calculate pH of buffer solution.