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

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

During electrolysis of molten NaCl, which of the following statements is correct?

When molten ionic compound is electrolyzed, a metal is formed at _______.

A cell constituted by two electrodes A (`"E"_("A"^+//"A")^0` = 0.35 V) and B (`"E"_("B"^+//"B")^0` = + 0.42 V) has value of `"E"_"cell"^0` equal to _________.

Name the process by which water produces hydrogen gas at cathode during electrolysis of aqueous NaCl.

Draw a neat and labelled diagram for electrolysis of fused NaCl.

What is the action of Grignard reagent on benzonitrile?

Draw a well labelled diagram of a conductivity cell. Also write net cell reactions involved in electrolysis of aqueous NaCl.

Write a mathematical formula for mole ratio. How long will it take to produce 2.415g of Ag metal from its salt solution by passing a current of 3A? Molar mass of Ag= 107.9 g mol^-1.