HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

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 ________________

Arrange the following compounds in increasing order of their boiling points.

Ethyl alcohol, Ethyl amine, Ethanoic acid, Ethane

Distinguish between methanamine, dimethanamine and trimethanamine using Hinsberg’s reagent.

Write the factors influencing the basicity of amines.

Discuss four points of anomalous behavior of fluorine.

Write the expression to calculate maximum work done when 1 mole of an ideal gas expands isothermally and reversibly from V₁ to V₂.

Nylon 6, 6 is a condensation polymer of hexamethylenediamine and _____________

Write the name of the catalyst used for preparation of high density polythene polymer.