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The alkali metals and their salts impart characteristic colour to an oxidizing flame because:
- a)sufficient light energy is absorbed to make an atom gain an electron
- b)the smallest atomic size makes them to absorb radiation
- c)the largest atomic size makes them to emit radiation
- d)there is emission of radiation in the visible region from the excited electron
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
The alkali metals and their salts impart characteristic colour to an o...
Alkali metals have one unpaired electron in their valence shell which gets excited absorbing the energy from flame and emit in visible reason of EM spectrum. Therfore imparts color to flame.
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The alkali metals and their salts impart characteristic colour to an o...
Explanation:
When an alkali metal or its salt is heated in a flame, the outermost electron of the metal atom gets excited to a higher energy level. This excited electron is unstable and quickly returns to its original energy level, emitting the excess energy in the form of light. This light is in the visible region of the electromagnetic spectrum, and it imparts a characteristic color to the flame.
Why is there emission of radiation in the visible region from the excited electron?
The emission of radiation in the visible region from the excited electron is due to the absorption and subsequent emission of energy by the electron. When an alkali metal or its salt is heated in a flame, the outermost electron of the metal atom absorbs energy from the flame and gets excited to a higher energy level. This excited electron is unstable and quickly returns to its original energy level, emitting the excess energy in the form of light. The energy of the emitted light corresponds to the energy difference between the excited state and the ground state of the electron.
Why is option 'D' the correct answer?
Option 'D' is the correct answer because it correctly explains the phenomenon of characteristic color imparted by alkali metals and their salts in an oxidizing flame. The emission of radiation in the visible region from the excited electron is responsible for the characteristic color of the flame, and option 'D' correctly explains this. Option 'A' is incorrect because gaining an electron has nothing to do with the emission of radiation. Option 'B' is incorrect because the size of the atom does not affect the absorption or emission of radiation. Option 'C' is incorrect because the largest atomic size does not make them emit radiation.
When an alkali metal or its salt is heated in a flame, the outermost electron of the metal atom gets excited to a higher energy level. This excited electron is unstable and quickly returns to its original energy level, emitting the excess energy in the form of light. This light is in the visible region of the electromagnetic spectrum, and it imparts a characteristic color to the flame.
Why is there emission of radiation in the visible region from the excited electron?
The emission of radiation in the visible region from the excited electron is due to the absorption and subsequent emission of energy by the electron. When an alkali metal or its salt is heated in a flame, the outermost electron of the metal atom absorbs energy from the flame and gets excited to a higher energy level. This excited electron is unstable and quickly returns to its original energy level, emitting the excess energy in the form of light. The energy of the emitted light corresponds to the energy difference between the excited state and the ground state of the electron.
Why is option 'D' the correct answer?
Option 'D' is the correct answer because it correctly explains the phenomenon of characteristic color imparted by alkali metals and their salts in an oxidizing flame. The emission of radiation in the visible region from the excited electron is responsible for the characteristic color of the flame, and option 'D' correctly explains this. Option 'A' is incorrect because gaining an electron has nothing to do with the emission of radiation. Option 'B' is incorrect because the size of the atom does not affect the absorption or emission of radiation. Option 'C' is incorrect because the largest atomic size does not make them emit radiation.
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The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer?
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The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer?.
The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer?.
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The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of The alkali metals and their salts impart characteristic colour to an oxidizing flame because:a)sufficient light energy is absorbed to make an atom gain an electronb)the smallest atomic size makes them to absorb radiationc)the largest atomic size makes them to emit radiationd)there is emission of radiation in the visible region from the excited electronCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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