NEET Exam > NEET Questions > An aqueous solution of salt 'R' when treated...
Start Learning for Free
An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' is
- a)Na2CO3
- b)NaClO3
- c)NaNO2
- d)Na2SO3
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
An aqueous solution of salt 'R' when treated with dil HCl, a colourle...
Answer:
Introduction:
In this question, we are given an aqueous solution of an unknown salt 'R' which gives out a colourless gas when treated with dilute hydrochloric acid (HCl). When this gas is passed through acidified potassium permanganate (KMnO4) solution, the KMnO4 solution gets decolourized. We need to identify the salt 'R' from the given options.
Explanation:
To determine the identity of the salt 'R', let's analyze the given information step by step.
Step 1: Reaction with Dilute HCl
When the aqueous solution of salt 'R' is treated with dilute hydrochloric acid (HCl), a colourless gas is evolved. This indicates the presence of a gas that is not soluble in water.
Step 2: Reaction with Acidified KMnO4
The evolved gas is then passed through acidified potassium permanganate (KMnO4) solution. This reaction is a test for the reducing property of the gas.
If the gas is a reducing agent, it will react with the acidified KMnO4 and reduce the Mn(VII) ions to Mn(II) ions. As a result, the purple color of KMnO4 solution will get decolourized.
Conclusion:
Based on the given information, we can conclude that the salt 'R' is sodium sulfite (Na2SO3). When sodium sulfite reacts with HCl, it produces sulfur dioxide (SO2) gas, which is a reducing agent. This gas then reacts with acidified KMnO4 and reduces the Mn(VII) ions to Mn(II) ions, leading to decolorization of the KMnO4 solution.
Therefore, the correct option is 'D' - Na2SO3.
Introduction:
In this question, we are given an aqueous solution of an unknown salt 'R' which gives out a colourless gas when treated with dilute hydrochloric acid (HCl). When this gas is passed through acidified potassium permanganate (KMnO4) solution, the KMnO4 solution gets decolourized. We need to identify the salt 'R' from the given options.
Explanation:
To determine the identity of the salt 'R', let's analyze the given information step by step.
Step 1: Reaction with Dilute HCl
When the aqueous solution of salt 'R' is treated with dilute hydrochloric acid (HCl), a colourless gas is evolved. This indicates the presence of a gas that is not soluble in water.
Step 2: Reaction with Acidified KMnO4
The evolved gas is then passed through acidified potassium permanganate (KMnO4) solution. This reaction is a test for the reducing property of the gas.
If the gas is a reducing agent, it will react with the acidified KMnO4 and reduce the Mn(VII) ions to Mn(II) ions. As a result, the purple color of KMnO4 solution will get decolourized.
Conclusion:
Based on the given information, we can conclude that the salt 'R' is sodium sulfite (Na2SO3). When sodium sulfite reacts with HCl, it produces sulfur dioxide (SO2) gas, which is a reducing agent. This gas then reacts with acidified KMnO4 and reduces the Mn(VII) ions to Mn(II) ions, leading to decolorization of the KMnO4 solution.
Therefore, the correct option is 'D' - Na2SO3.
Free Test
FREE
| Start Free Test |
Community Answer
An aqueous solution of salt 'R' when treated with dil HCl, a colourle...
Ince 'R' gives a colourless gas on reaction with dil HCl, so it contains CO32- or SO32- as anion (i.e., CO2 or SO2 is evolved).
Since the gas decolourises acidified KMnO4 solution so it is SO2 and thus the anion present is SO32- i.e., the salt 'R' is Na2SO3 .
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
|
Explore Courses for NEET exam
|
|
Similar NEET Doubts
Top Courses for NEETView all
An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer?
Question Description
An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer?.
An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer?.
Solutions for An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer?, a detailed solution for An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An aqueous solution of salt 'R' when treated with dil HCl, a colourless gas is given out. The gas so evolved when passed through acidified KMnO4 decolourises KMnO4 solution. The salt 'R' isa)Na2CO3b)NaClO3c)NaNO2d)Na2SO3Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
|
|
Explore Courses for NEET exam
|
|
Suggested Free Tests
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!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup