23 Organic Reactions SAQ2
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Questions and Answers

In the halogenation of alkenes, what is the result of the end-on approach of Br2 to the double bond?

The double bond is polarized and Br2 is split into Br+ and Br-.

What type of bond is formed when Br+ gains an electron from the double bond?

A covalent bond.

What is the definition of a free radical?

A highly reactive species with an unpaired electron.

What is the purpose of UV light in the free radical substitution reaction?

<p>To split Cl2 into two Cl atoms, each with one electron.</p> Signup and view all the answers

What is the result of the attack of Br+ on the C=C bond?

<p>The C=C bond is broken, and a covalent bond is formed between Br+ and one of the double-bonded C’s.</p> Signup and view all the answers

What is a requirement for the ionic addition of Br₂, Cl₂, or HCl across C=C in ethene?

<p>Heat</p> Signup and view all the answers

What catalyst is used in a reaction such as the ionic addition of Br₂, Cl₂, or HCl across C=C in ethene?

<p>A Ni catalyst</p> Signup and view all the answers

What type of reaction involves the removal of a small molecule from a large molecule, leaving a C=C behind?

<p>Elimination reaction</p> Signup and view all the answers

What is the product of the reaction between a primary alcohol and sodium?

<p>Aldehyde</p> Signup and view all the answers

What is the term for the chemical decomposition of a substance by water, resulting in the breakdown of the substance and water itself?

<p>Hydrolysis</p> Signup and view all the answers

What is the term for the reaction between a carboxylic acid and an alcohol, resulting in the formation of an ester?

<p>Esterification</p> Signup and view all the answers

What is the term for the joining together of small molecules to form larger molecules?

<p>Polymerisation</p> Signup and view all the answers

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