5 Questions
Why is hydrogen used as a fuel?
Hydrogen is used as a fuel because it has a high heat of combustion.
Why can't hydrogen be collected by downward displacement of air, despite being lighter than air?
It is not safe to collect hydrogen by downward displacement of air because a mixture of hydrogen and air can lead to an explosion.
What produces a pop sound when hydrogen is burned?
A pop sound is produced when hydrogen is burned.
Balance the chemical equation for the reaction of copper oxide with hydrogen.
CuO + H2 ⟶ Cu + H2O
What is the balanced chemical equation for the reaction of zinc with hydrochloric acid?
Zn + 2HCl ⟶ ZnCl2 + H2
Study Notes
Hydrogen Properties
- Hydrogen is lighter than air.
- Hydrogen is sparingly soluble in water.
Combustion of Hydrogen
- Hydrogen burns with an oxyhydrogen pale blue flame and a pop sound is heard.
Reactivity of Hydrogen
- A metal sodium in the reactivity series gives hydrogen with water.
- Hydrogen reacts with metal oxides to form metal and water.
Redox Reactions
- Oxidation is the removal of hydrogen and the addition of oxygen.
- In redox reactions, oxidation and reduction occur simultaneously.
- The removal of hydrogen from a substance is called reduction.
Hydrogen Reactions
- Nitric acid can be used to prepare hydrogen by its action on active metals.
- The reaction between hydrogen and nitrogen to form ammonia is reversible.
- Zinc can liberate hydrogen from water, acid, and alkali solutions.
Hydrogen Characteristics
- Hydrogen is a combustible gas, but it is not a supporter of combustion.
- Hydrogen gas is not easily liquefiable.
- Hydrogen molecule is not monovalent.
Test your knowledge of hydrogen properties and reactions with this quiz. Fill in the blanks and indicate the correct statements to demonstrate your understanding of hydrogen's behavior.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
