Chemistry
Grade-8
Easy
Question
State whether the following statements are True or False.
(i) Hydrogen gas is easily liquefiable.
(ii) Hydrogen is the best fuel as a huge amount of heat is produced.
(iii) The only by-product of using hydrogen as a fuel is water.
(i)
(ii)
(iii)
True
True
False
(i)
(ii)
(iii)
True
False
False
(i)
(ii)
(iii)
False
True
False
(i)
(ii)
(iii)
False
False
True
| (i) | (ii) | (iii) |
| True | True | False |
| (i) | (ii) | (iii) |
| True | False | False |
| (i) | (ii) | (iii) |
| False | True | False |
| (i) | (ii) | (iii) |
| False | False | True |
Hint:
D
The correct answer is:
(i)
(ii)
(iii)
False
False
True
Hydrogen gas is not easily liquefiable as it has weak intermolecular attraction.
Hydrogen is the best fuel as it reduces emissions or greenhouse gases.
Hydrogen produces water vapour as by product when combined with oxygen during combustion.
Related Questions to study
Chemistry
Observe the given reaction carefully and identify (i), (ii), (iii), and (iv).
Observe the given reaction carefully and identify (i), (ii), (iii), and (iv).
ChemistryGrade-8
Chemistry
Identify the oxidation reaction from the following:
Identify the oxidation reaction from the following:
ChemistryGrade-8
Chemistry
The oxidizing agent itself undergoes
The oxidizing agent itself undergoes
ChemistryGrade-8
Chemistry
Methyl alcohol (CH3OH) can be prepared by using
Methyl alcohol (CH3OH) can be prepared by using
ChemistryGrade-8
Chemistry
Identify the fuel used in the following:
Identify the fuel used in the following:
ChemistryGrade-8
Chemistry
Identify the pollution-free fuel from the list of fuels given below.
Identify the pollution-free fuel from the list of fuels given below.
ChemistryGrade-8
Chemistry
Catalytic hydrogenation takes place in the presence of______.
Catalytic hydrogenation takes place in the presence of______.
ChemistryGrade-8
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
Chemistry
The type of reaction which is not a redox reaction is
The type of reaction which is not a redox reaction is
ChemistryGrade-8
Chemistry
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
Chemistry
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
