Chemistry Exam > Chemistry Questions > Select correct statement(s):a)When Cl2 is add...
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Select correct statement(s):
- a)When Cl2 is added to KI solution containing chloroform, chloroform turns violet
- b)KI gives violet vapors when treated with conc. H2SO4
- c)Ca+2 ion gives brick red color in flame test
- d)All of them
Correct answer is option 'D'. Can you explain this answer?
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Select correct statement(s):a)When Cl2 is added to KI solution contain...
Explanation:
Statement a: When Cl2 is added to KI solution containing chloroform, chloroform turns violet.
This statement is incorrect. When Cl2 is added to KI solution containing chloroform, the chloroform does not turn violet. Instead, it forms a layer at the bottom of the mixture due to its higher density compared to water. This is because chloroform is immiscible in water. The reaction of Cl2 with KI in water results in the formation of KCl and I2. The I2 formed gives a purple color to the water, but the chloroform layer remains unchanged.
Statement b: KI gives violet vapors when treated with conc. H2SO4.
This statement is incorrect. When KI is treated with concentrated H2SO4, it does not give violet vapors. Instead, it produces violet fumes of iodine. This is because concentrated sulfuric acid is a strong oxidizing agent and oxidizes iodide ions (I-) to iodine (I2) gas. The violet fumes of iodine can be observed above the reaction mixture.
Statement c: Ca2+ ion gives brick red color in flame test.
This statement is correct. When calcium ions (Ca2+) are heated in a flame, they give a brick red color. This is a characteristic flame color for calcium. The heat causes the electrons in the calcium atoms to absorb energy and jump to higher energy levels. When these electrons return to their ground state, they release energy in the form of light. The specific energy levels and transitions in calcium atoms result in the emission of light with a wavelength corresponding to the brick red color.
Therefore, the correct statement is:
d) All of them
Statement a: When Cl2 is added to KI solution containing chloroform, chloroform turns violet.
This statement is incorrect. When Cl2 is added to KI solution containing chloroform, the chloroform does not turn violet. Instead, it forms a layer at the bottom of the mixture due to its higher density compared to water. This is because chloroform is immiscible in water. The reaction of Cl2 with KI in water results in the formation of KCl and I2. The I2 formed gives a purple color to the water, but the chloroform layer remains unchanged.
Statement b: KI gives violet vapors when treated with conc. H2SO4.
This statement is incorrect. When KI is treated with concentrated H2SO4, it does not give violet vapors. Instead, it produces violet fumes of iodine. This is because concentrated sulfuric acid is a strong oxidizing agent and oxidizes iodide ions (I-) to iodine (I2) gas. The violet fumes of iodine can be observed above the reaction mixture.
Statement c: Ca2+ ion gives brick red color in flame test.
This statement is correct. When calcium ions (Ca2+) are heated in a flame, they give a brick red color. This is a characteristic flame color for calcium. The heat causes the electrons in the calcium atoms to absorb energy and jump to higher energy levels. When these electrons return to their ground state, they release energy in the form of light. The specific energy levels and transitions in calcium atoms result in the emission of light with a wavelength corresponding to the brick red color.
Therefore, the correct statement is:
d) All of them
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Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer?
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Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer?.
Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemistry.
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Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Select correct statement(s):a)When Cl2 is added to KI solution containing chloroform, chloroform turns violetb)KI gives violet vapors when treated with conc. H2SO4c)Ca+2 ion gives brick red color in flame testd)All of themCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Chemistry tests.
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