DSSSB TGT/PGT/PRT Exam > DSSSB TGT/PGT/PRT Questions > Which among the following metals catches fire...
Start Learning for Free
Which among the following metals catches fire when kept in open?
- a)Lead and silver
- b)Gold and silver
- c)Sodium and Potassium
- d)Magnesium
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which among the following metals catches fire when kept in open?a)Lead...
Introduction
When discussing metals that can catch fire when exposed to air, it's essential to consider their reactivity with oxygen. Among the options provided, sodium and potassium are known for their vigorous reactions.
Reactivity of Sodium and Potassium
- Sodium and Potassium:
- These are alkali metals located in Group 1 of the periodic table.
- They are highly reactive, especially with water and oxygen.
- When exposed to air, they can form oxides and hydroxides rapidly.
- This reaction can produce enough heat to ignite the metal.
Comparison with Other Metals
- Lead and Silver:
- Both metals are relatively unreactive compared to alkali metals.
- They do not ignite in air under normal conditions.
- Gold and Silver:
- These noble metals are known for their resistance to oxidation and corrosion.
- They do not catch fire or react significantly with air.
- Magnesium:
- While magnesium is combustible and can burn in air, it requires a higher temperature to ignite compared to sodium and potassium.
- Magnesium can catch fire when finely powdered or in a ribbon form but is not as reactive at room temperature.
Conclusion
In summary, sodium and potassium stand out as the metals that can readily catch fire when kept in open air due to their high reactivity. This characteristic is a significant reason why they are stored under oil or in inert atmospheres to prevent accidental ignition.
When discussing metals that can catch fire when exposed to air, it's essential to consider their reactivity with oxygen. Among the options provided, sodium and potassium are known for their vigorous reactions.
Reactivity of Sodium and Potassium
- Sodium and Potassium:
- These are alkali metals located in Group 1 of the periodic table.
- They are highly reactive, especially with water and oxygen.
- When exposed to air, they can form oxides and hydroxides rapidly.
- This reaction can produce enough heat to ignite the metal.
Comparison with Other Metals
- Lead and Silver:
- Both metals are relatively unreactive compared to alkali metals.
- They do not ignite in air under normal conditions.
- Gold and Silver:
- These noble metals are known for their resistance to oxidation and corrosion.
- They do not catch fire or react significantly with air.
- Magnesium:
- While magnesium is combustible and can burn in air, it requires a higher temperature to ignite compared to sodium and potassium.
- Magnesium can catch fire when finely powdered or in a ribbon form but is not as reactive at room temperature.
Conclusion
In summary, sodium and potassium stand out as the metals that can readily catch fire when kept in open air due to their high reactivity. This characteristic is a significant reason why they are stored under oil or in inert atmospheres to prevent accidental ignition.
Free Test
FREE
| Start Free Test |
Community Answer
Which among the following metals catches fire when kept in open?a)Lead...
When sodium and potassium are kept in open they both will react violently with atmosphere gas and it will ‘catches fire so both these metals are must kept in kerosene oil because they arehighly reactive metal.
|
Explore Courses for DSSSB TGT/PGT/PRT exam
|
|
Top Courses for DSSSB TGT/PGT/PRTView all
Question Description
Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? for DSSSB TGT/PGT/PRT 2025 is part of DSSSB TGT/PGT/PRT preparation. The Question and answers have been prepared according to the DSSSB TGT/PGT/PRT exam syllabus. Information about Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for DSSSB TGT/PGT/PRT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer?.
Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? for DSSSB TGT/PGT/PRT 2025 is part of DSSSB TGT/PGT/PRT preparation. The Question and answers have been prepared according to the DSSSB TGT/PGT/PRT exam syllabus. Information about Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for DSSSB TGT/PGT/PRT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for DSSSB TGT/PGT/PRT.
Download more important topics, notes, lectures and mock test series for DSSSB TGT/PGT/PRT Exam by signing up for free.
Here you can find the meaning of Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which among the following metals catches fire when kept in open?a)Lead and silverb)Gold and silverc)Sodium and Potassiumd)MagnesiumCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice DSSSB TGT/PGT/PRT tests.
|
|
Explore Courses for DSSSB TGT/PGT/PRT exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup