Leaving Cert Chemistry: Hydrogenation and Related Concepts

Chemistry

This quiz covers definitions related to chemical reactions, specifically focusing on hydrogenation and concepts like Biochemical Oxygen Demand, Heat of Formation, and Heat of Combustion, often encountered in Leaving Cert Chemistry.

Chemical Reactions Organic Chemistry Definitions

10 Questions Medium Ages 16+ Feb 12, 2026

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About this Study Set

This study set covers Chemistry through 10 practice questions. This quiz covers definitions related to chemical reactions, specifically focusing on hydrogenation and concepts like Biochemical Oxygen Demand, Heat of Formation, and Heat of Combustion, often encountered in Leaving Cert Chemistry. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 10 questions from the Leaving Cert Chemistry: Hydrogenation and Related Concepts study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the process called when hydrogen is added to an alkene molecule using a nickel catalyst at 200°C?

A Biochemical Oxygen Demand
B Heat of Formation
C Heat of Combustion
D Hydrogenation Reaction

2 Which term describes the amount of oxygen required by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period?

A Biochemical Oxygen Demand
B Heat of Formation
C Heat of Combustion
D Hydrogenation Reaction

3 What does 'Heat of Formation' refer to in chemistry?

A The energy released when a substance burns completely.
B The energy change when one mole of a compound is formed from its constituent elements in their standard states.
C The amount of oxygen needed to decompose organic matter.
D The addition of hydrogen to an unsaturated molecule.

4 Which option best defines 'Heat of Combustion'?

A The energy released during the formation of a compound.
B The energy required to break chemical bonds.
C The heat released when one mole of a substance undergoes complete combustion with oxygen.
D The process of adding hydrogen to an alkene.

5 A nickel catalyst and a temperature of 200°C are typically involved in which specific chemical reaction?

A Biochemical Oxygen Demand measurement
B Heat of Formation calculation
C Heat of Combustion experiment
D Hydrogenation Reaction

6 If a question asks about the 'energy change when one mole of a compound is formed from its elements in their standard states,' it is likely referring to:

A Hydrogenation Reaction
B Heat of Combustion
C Biochemical Oxygen Demand
D Heat of Formation

7 The term 'BOD' is an abbreviation for:

A Heat of Formation
B Biochemical Oxygen Demand
C Hydrogenation Reaction
D Heat of Combustion

8 Which of the following is a reaction where hydrogen is added to a molecule, often an alkene?

A Heat of Combustion
B Biochemical Oxygen Demand
C Hydrogenation Reaction
D Heat of Formation

9 The energy released during the complete burning of a substance is known as its:

A Heat of Formation
B Biochemical Oxygen Demand
C Hydrogenation Reaction
D Heat of Combustion

10 In the context of chemical definitions, what might '200°C' and 'nickel catalyst' be indicators of?

A Biochemical Oxygen Demand
B Heat of Formation
C Heat of Combustion
D Hydrogenation Reaction

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