Photo AI

This question is about the reaction scheme shown - AQA - A-Level Chemistry - Question 10 - 2022 - Paper 2

Question icon

Question 10

This-question-is-about-the-reaction-scheme-shown-AQA-A-Level Chemistry-Question 10-2022-Paper 2.png

This question is about the reaction scheme shown. Step 1 Step 2 Step 3 Step 4 Step 5 Amine B is formed in step 5.

Worked Solution & Example Answer:This question is about the reaction scheme shown - AQA - A-Level Chemistry - Question 10 - 2022 - Paper 2

Step 1

step 1

96%

114 rated

Answer

The reagents needed for step 1 are concentrated nitric acid (HNO3) and concentrated sulfuric acid (H2SO4).

Step 2

step 2

99%

104 rated

Answer

The reagents needed for step 2 are sodium amide (NaNH2) or any similar amine.

Step 3

Give the name of the mechanism for the reaction in step 3.

96%

101 rated

Answer

The mechanism for the reaction in step 3 is nucleophilic addition-elimination.

Step 4

Name the reagent for step 4.

98%

120 rated

Answer

The reagent for step 4 is chlorine (Cl2).

Step 5

State a necessary condition for step 4.

97%

117 rated

Answer

A necessary condition for step 4 is the presence of UV light or elevated temperatures (above 300 °C).

Step 6

Explain why the yield of B in step 5 is less than the yield of A in step 2.

97%

121 rated

Answer

In step 5, multiple substitutions can occur, leading to further products and reducing the yield of amine B. In contrast, in step 2, the reaction primarily produces only one amine A, resulting in a higher yield.

Step 7

Explain why amine B is a stronger base than amine A.

96%

114 rated

Answer

Amine B has an alkyl group which donates electron density through inductive effects, enhancing its basicity. In contrast, amine A is influenced by a less electron-donating group, making it a weaker base.

Join the A-Level students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

Other A-Level Chemistry topics to explore

Atomic Structure

Chemistry - AQA

Formulae, Equations & Calculations

Chemistry - AQA

The Mole, Avogadro & The Ideal Gas Equation

Chemistry - AQA

Types of Bonding & Properties

Chemistry - AQA

Molecules: Shapes & Forces

Chemistry - AQA

Energetics

Chemistry - AQA

Kinetics

Chemistry - AQA

Chemical Equilibria, Le Chateliers Principle & Kc

Chemistry - AQA

Oxidation, Reduction & Redox Equations

Chemistry - AQA

Periodicity

Chemistry - AQA

Group 2, the Alkaline Earth Metals

Chemistry - AQA

Group 7 (17), the Halogens

Chemistry - AQA

Introduction to Organic Chemistry

Chemistry - AQA

Alkanes

Chemistry - AQA

Halogenoalkanes

Chemistry - AQA

Alkenes

Chemistry - AQA

Alcohols

Chemistry - AQA

Organic Analysis

Chemistry - AQA

Organic & Inorganic Chemistry Practicals

Chemistry - AQA

Thermodynamics

Chemistry - AQA

Rate Equations

Chemistry - AQA

Equilibrium constant (Kp) for Homogeneous Systems

Chemistry - AQA

Electrode Potentials & Electrochemical Cells

Chemistry - AQA

Fundamentals of Acids & Bases

Chemistry - AQA

Further Acids & Bases Calculations

Chemistry - AQA

Properties of Period 3 Elements & their Oxides

Chemistry - AQA

Transition Metals

Chemistry - AQA

Reactions of Ions in Aqueous Solution

Chemistry - AQA

Optical Isomerism

Chemistry - AQA

Aldehydes & Ketones

Chemistry - AQA

Carboxylic Acids & Derivatives

Chemistry - AQA

Aromatic Chemistry

Chemistry - AQA

Amines

Chemistry - AQA

Polymers

Chemistry - AQA

Amino acids, Proteins & DNA

Chemistry - AQA

Organic Synthesis

Chemistry - AQA

Organic Mechanisms

Chemistry - AQA

Nuclear Magnetic Resonance Spectroscopy

Chemistry - AQA

Chromatography

Chemistry - AQA

Physical Chemistry Practicals

Chemistry - AQA

Organic Chemistry Practicals

Chemistry - AQA

;