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

Assertion: In mono haloarenes, electrophilic substitution occurs at ortho and para positions.

Reason: Halogen atom is a ring deactivator.

Consider the reaction,

\[\ce{CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr}\]

This reaction will be the fastest in

Ethylidene chloride on treatment with aqueous KOH gives ______.

Chloroform reacts with nitric acid to produce ______.

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

\[\ce{CH3 – CH = CH – Cl}\]

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

C₆H₅CH₂I

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

\[\begin{array}{cc}\ce{CH3 - CH - CH3}\\
|\phantom{..}\\\ce{Br}\end{array}\]

Classify the following compound in the form of alkyl, allylic, vinyl, benzylic halides.

CH₂ = CH – Cl

Why chlorination of methane is not possible in dark?

How will you prepare n propyl iodide from n-propyl bromide?

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