Chemistry
Grade-8
Easy
Question
Catalytic hydrogenation takes place in the presence of______.
- Reactor
- Oxidate
- Precursor
- Catalyst
Hint:
Catalyst. Examples are nickel, platinum or palladium.
The correct answer is: Catalyst
Hydrogenation is defined as the chemical reaction taking place between the molecular hydrogen and another element or compound. This chemical reaction takes place in the presence of catalysts such as Platinum, Nickel or Palladium.
Related Questions to study
Chemistry
For the given reaction, match column I with column II and mark the correct option from the codes given below.
| Column A |
Column B |
| (a) Oxidizing agent |
(i) H2 |
| (b) Reducing agent |
(ii) 4 |
| (c) x |
(iii) 3 |
| (d) y |
(iv) Fe3O4 |
For the given reaction, match column I with column II and mark the correct option from the codes given below.
| Column A |
Column B |
| (a) Oxidizing agent |
(i) H2 |
| (b) Reducing agent |
(ii) 4 |
| (c) x |
(iii) 3 |
| (d) y |
(iv) Fe3O4 |
ChemistryGrade-8
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The type of reaction which is not a redox reaction is
The type of reaction which is not a redox reaction is
ChemistryGrade-8
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During the redox reaction, the reducing agent itself gets _______ during the reaction.
During the redox reaction, the reducing agent itself gets _______ during the reaction.
ChemistryGrade-8
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Given below are two statements labeled as Assertion (A) and Reason (R).
Assertion(A): Hydrogen at present cannot be used as fuel on a large scale.
Reason(R): Storage of hydrogen is dangerous as it is a light gas that is very explosive.
Select the most appropriate answer from the options given below:
Given below are two statements labeled as Assertion (A) and Reason (R).
Assertion(A): Hydrogen at present cannot be used as fuel on a large scale.
Reason(R): Storage of hydrogen is dangerous as it is a light gas that is very explosive.
Select the most appropriate answer from the options given below:
ChemistryGrade-8
Chemistry
Why did helium replace hydrogen in weather observation balloons?
(i) It forms a mixture of air that can explode.
(ii) It is heavier than hydrogen.
(iii) It is very expensive to use hydrogen gas in balloons.
Why did helium replace hydrogen in weather observation balloons?
(i) It forms a mixture of air that can explode.
(ii) It is heavier than hydrogen.
(iii) It is very expensive to use hydrogen gas in balloons.
ChemistryGrade-8
Chemistry
Identify the redox reaction from the following chemical reactions.
(i) 
(ii) 
(iii) 
(iv) 
Options:
Identify the redox reaction from the following chemical reactions.
(i)
(ii)
(iii)
(iv)
Options:
ChemistryGrade-8
Chemistry
In the chemical reaction below, find out the compound which acts as a reducing agent.
In the chemical reaction below, find out the compound which acts as a reducing agent.
ChemistryGrade-8
Chemistry
Out of the following, which fuel contains the largest percentage of hydrogen?
Out of the following, which fuel contains the largest percentage of hydrogen?
ChemistryGrade-8
Chemistry
Identify the oxidizing agent from the following:
Identify the oxidizing agent from the following:
ChemistryGrade-8
Chemistry
The substance which supplies hydrogen during the oxidation-reduction reaction is called
The substance which supplies hydrogen during the oxidation-reduction reaction is called
ChemistryGrade-8
Chemistry
Reduction is a process that involves
Reduction is a process that involves
ChemistryGrade-8
Chemistry
The process in which hydrogen is removed from the substance is known as _____.
The process in which hydrogen is removed from the substance is known as _____.
ChemistryGrade-8
Chemistry
Which of the following application does not represent the uses of hydrogen?
Which of the following application does not represent the uses of hydrogen?
ChemistryGrade-8
Chemistry
The mixture of hydrogen and oxygen, when burnt together, gives a flame known as ________.
The mixture of hydrogen and oxygen, when burnt together, gives a flame known as ________.
ChemistryGrade-8
Chemistry
The substance that removes the oxygen or supplies hydrogen during the redox reaction is known as
The substance that removes the oxygen or supplies hydrogen during the redox reaction is known as
ChemistryGrade-8
