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

If the total volume of a simple cubic unit cell is 6.817 × 10^-23 cm³, what is the volume occupied by particles in the unit cell?

Find the number of atoms in the fcc unit cell.

Calculate the number of unit cells in 0.3 g of a species having density of 8.5 g/cm³ and unit cell edge length 3.25 × 10^-8 cm.

Derive the relationship between density of substance, its molar mass, and the unit cell edge length. Explain how you will calculate the number of particles, and a number of unit cells in x g of metal.

State Raoult’s law. 

What type of solutions exhibit positive deviations from Raoult’s law?

What is enthalpy change and volume change of mixing of two components forming an ideal solution?

The vapour pressures of pure liquids A and B are 0.600 bar and 0.933 bar respectively, at a certain temperature.
What is the mole fraction of liquid B in the solution when the total vapour pressure of their mixture is 0.8 bar?

Distinguish between ideal and non-ideal solutions.

What is the action of atmospheric oxygen on ethers?

With the help of vapour pressure-temperature curves for solution and solvent, explain why boiling point of solvent is elevated when a nonvolatile solute is dissolved into it.

The vapour pressure of a pure solvent at a certain temperature is 0.0227 bar. What is the vapour pressure of a solution containing 6 g of solute (M = 60 g/mol) in 50 g of solvent?

What are non-ideal solutions?

Explain with reasons and diagrams, the positive and negative deviations from Raoult’s law shown by nonideal solutions.

Write chemical equation of acetyl chloride with ethanol

Write the preparation of ethanol from methyl magnesium iodide.

Write the reaction between ethanol and acetic anhydride.

Explain the fact that in alkyl aryl ethers, the alkoxy group is ring activating and ortho/para directing towards electrophilic aromatic substitution.

How will you prepare diethyl ether by dehydration of alcohol?

What are the limitations to prepare ether by this method?