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![Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 7 - Hydrogen - Shaalaa.com](/images/concise-chemistry-english-class-8-icse_6:3eba9a383eb74e06b4937fa0eadb7842.jpg "Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 7 - Hydrogen")
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Solutions for Chapter 7: Hydrogen
Below listed, you can find solutions for Chapter 7 of CISCE Selina for Concise Chemistry [English] Class 8 ICSE.
Selina solutions for Concise Chemistry [English] Class 8 ICSE 7 Hydrogen Exercise [Pages 98 - 99]
Fill in the blank
Hydrogen is ..................... than air.
Fill in the blank
Hydrogen is ...................soluble in water.
Hydrogen burns with a ______ flame and ______ sound is heard.
A metal ______ hydrogen in the reactivity series gives hydrogen with ______.
Fill in the blank
Hydrogen reacts with metal oxides to form ............and....................
Fill in the blank
Oxidation is the removal of ......................and addition of ....................
Fill in the blank
In redox reaction oxidation and reduction occur ............................
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
True
False
Indicate which of the following statement is true and which is false:
The removal of hydrogen from a substance is called reduction.
True
False
Indicate which of the following statement is true and which is false:
Nitric acid cannot be used to prepare hydrogen by its action on active metals.
True
False
Indicate which of the following statement is true and which is false:
The reaction between hydrogen and nitrogen to form ammonia is reversible.
True
False
Indicate which of the following statement is true and which is false:
Zinc can liberate hydrogen from water, acid and alkali solution.
True
False
Hydrogen is combustible as well as a supporter of combustion.
True
False
Indicate which of the following statement is true and which is false:
Hydrogen gas is easily liquefiable.
True
False
Complete and balance the following equation:
H2+____________→ 2HCI
Complete and balance the following equation:
H2 + S → ___________
Complete and balance the following equation:
Zn +_________________→ZnCl2 + H2
Complete and balance the following equation:
CuO +__________→ Cu +___________
Complete and balance the following equation:
Fe + H2O →___________+____________
Complete and balance the following equation:
\[\ce{K + H2O -> }\]________+ ________
Give reasons for the following:
Hydrogen can be used as a fuel.
Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
Give reason for the following:
A pop sound produced when hydrogen is burnt?
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
Give reason for the following:
Nitric acid not used for the preparation of hydrogen gas?
Name the following:
Two metals which give hydrogen with cold water.
Name the following:
A metal which liberates hydrogen only when steam is passed over red hot metal.
Name the following:
The process in which oxygen is added or hydrogen is removed.
Name the following:
A metallic oxide which can be reduced into metal by hydrogen.
Name the chemicals required to prepare hydrogen gas in the laboratory.
Give a balanced chemical equation for the reaction.
Draw a neat and well-labelled diagram for the laboratory preparation of hydrogen.
How is hydrogen gas collected? Why?
How would you show that hydrogen is a non-supporter of combustion?
How would you show that hydrogen is lighter than air?
Hydrogen is a good reducing agent: What do you understand by the above statement? Explain with the help of copper oxide as an example.
Name a process by which hydrogen gas is manufactured.
Give equations for the reactions.
How is hydrogen separated from carbon dioxide and carbon monoxide?
Match the statements in Column A with those in Column B.
| Column A | Column B |
|
1. A metal which reacts with cold water to from hydrogen. |
1. Reduction |
| 2. A gas which is inflammable and non-supporter of combustion | 2. Hydrogenation |
|
3. A process in which vanspati ghee is prepared from vegitable oils |
3. oxidation |
|
4. The removal ofhydrogen or addition of oxygen |
4. sodium |
| 5. The addition of hydrogen or removal of oxygen | 5. Hydrogen |
State four uses of hydrogen:
Define catalytic hydrogenation.
Define an oxidation reaction.
Define reduction.
Define redox reaction.
Multiple Choice Question
Equal volumes of hydrogen and chlorine are exposed to diffused sunlight to prepare
hydrogen chloride
water
sodium hydroxide
hydrochloric acid
Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
magnesium
aluminium
calcium
iron
Multiple Choice Question
In metal activity series the more reactive metals are at
top
bottom
middle
none
Multiple Choice Question
Hydrogen is responsible for producing
heat and light
hydrogenated oil
fertilizers
all of the above
Multiple Choice Question
Hydrogen is
Multiple Choice Question
Water gas is a mixture of
carbon monoxide and oxygen
carbon monoxide and hydrogen
hydrogen and oxygen
hydrogen and nitrogen.
Solutions for 7: Hydrogen
Selina solutions for Concise Chemistry [English] Class 8 ICSE chapter 7 - Hydrogen
Shaalaa.com has the CISCE Mathematics Concise Chemistry [English] Class 8 ICSE CISCE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Selina solutions for Mathematics Concise Chemistry [English] Class 8 ICSE CISCE 7 (Hydrogen) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Selina textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Concise Chemistry [English] Class 8 ICSE chapter 7 Hydrogen are Hydrogen, Uses of Hydrogen, Chemical Properties of Carbon Compounds > Oxidation, Preparation of Hydrogen, Recognition and Identification of Gases, Manufacture of Hydrogen, Chemical Properties of Hydrogen, Tests for Hydrogen, Physical Properties of Hydrogen.
Using Selina Concise Chemistry [English] Class 8 ICSE solutions Hydrogen exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Selina Solutions are essential questions that can be asked in the final exam. Maximum CISCE Concise Chemistry [English] Class 8 ICSE students prefer Selina Textbook Solutions to score more in exams.
Get the free view of Chapter 7, Hydrogen Concise Chemistry [English] Class 8 ICSE additional questions for Mathematics Concise Chemistry [English] Class 8 ICSE CISCE, and you can use Shaalaa.com to keep it handy for your exam preparation.
