HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

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?

What is the action of following on diethyl ether?

dil. H₂SO₄

What is the action of following on diethyl ether?

PCl₅

The strongest base amongst the following is

Tertiary amines have lowest boiling points because ________________