HSC Science Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

How does chlorobenzene react with sodium in the presence of ether? What is the name of the reaction?

Write a chemical reaction useful to prepare the following:

Freon – 12 from Carbon tetrachloride

Write a chemical reaction useful to prepare the following:

Carbon tetrachloride from carbon disulphide.

What are Freons?

Discuss uses of freons.

Discuss the environmental effects of freons.

Explain the mechanism of S_N¹ reaction by highlighting the stereochemistry behind it.

Explain the preparation of the following compound.

DDT

Explain the preparation of the following compound.

Chloroform

Explain the preparation of the following compound.

Biphenyl

Explain the preparation of the following compound.

Chloropicrin

Explain the preparation of the following compound.

Freon-12

A hydrocarbon C₃H₆(A) reacts with HBr to form compound (B). Compound (B) reacts with aqueous potassium hydroxide to give (C) of molecular formula C₃H₆O. What are the (A), (B) and (C). Explain the reactions.

Two isomers (A) and (B) have the same molecular formula C₂H₄Cl₂. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C₂H₄O. Compound (B) reacts with aqueous KOH gives compound (D) of molecular formula C₂H₆O₂. Identify (A), (B), (C) and (D).

Which of the following pairs of elements exhibit diagonal relationship?

Why do halogens act as oxidising agents?

Mention any two anomalous properties of second period elements.

Explain the diagonal relationship.

When hydrogen peroxide is shaken with an acidified solution of potassium dichromate in presence of ether, the ethereal layer turns blue due to the formation of

Hydrogen peroxide can function as an oxidising agent as well as the reducing agent. substantiate this statement with suitable examples.