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Only One Option Correct Type
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q. 
A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation of
  • a)
    [Fe(SCN)5NO]-
  • b)
    [Fe(SCN)5NO]2-
  • c)
    [Fe(CN)5NOS]4-
  • d)
    [Fe(CN)5NOS]3-
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Only One Option Correct TypeDirection (Q. Nos. 1-10) This section cont...
Na2S + Na2[Fe(CN)5NO] →
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Only One Option Correct TypeDirection (Q. Nos. 1-10) This section cont...
Explanation:

To understand why the filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution, we need to examine the reaction that takes place between these two substances.

Reaction:
Na2S + [Fe(CN)5NO]2 -> [Fe(SCN)5NO]2- + Na2SO4

Explanation of the reaction:
1. The alkaline Na2S solution contains Na2S, which is a reducing agent.
2. The ammoniacal sodium nitroprusside solution contains [Fe(CN)5NO]2-, which is a complex ion.
3. When the two solutions come into contact, a redox reaction occurs.
4. The reducing agent (Na2S) donates electrons to the complex ion ([Fe(CN)5NO]2-), causing a reduction reaction.
5. The [Fe(CN)5NO]2- complex ion is reduced to [Fe(SCN)5NO]2-, which is a violet-colored complex ion.
6. The Na2S is oxidized to Na2SO4.

Conclusion:
The violet color observed on the filter paper is due to the formation of the [Fe(SCN)5NO]2- complex ion. This complex ion is formed as a result of the reduction reaction between the alkaline Na2S solution and the ammoniacal sodium nitroprusside solution.

Summary:
- The filter paper turns violet due to the formation of the [Fe(SCN)5NO]2- complex ion.
- The color change is a result of a reduction reaction between the Na2S solution and the sodium nitroprusside solution.
- The reduction reaction causes the [Fe(CN)5NO]2- complex ion to be converted into the [Fe(SCN)5NO]2- complex ion.
- The Na2S solution is oxidized to Na2SO4 in the process.
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Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation ofa)[Fe(SCN)5NO]-b)[Fe(SCN)5NO]2-c)[Fe(CN)5NOS]4-d)[Fe(CN)5NOS]3-Correct answer is option 'B'. Can you explain this answer?
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Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation ofa)[Fe(SCN)5NO]-b)[Fe(SCN)5NO]2-c)[Fe(CN)5NOS]4-d)[Fe(CN)5NOS]3-Correct answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation ofa)[Fe(SCN)5NO]-b)[Fe(SCN)5NO]2-c)[Fe(CN)5NOS]4-d)[Fe(CN)5NOS]3-Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation ofa)[Fe(SCN)5NO]-b)[Fe(SCN)5NO]2-c)[Fe(CN)5NOS]4-d)[Fe(CN)5NOS]3-Correct answer is option 'B'. Can you explain this answer?.
Solutions for Only One Option Correct TypeDirection (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.A filter paper moistened with ammoniacal sodium nitroprusside solution turns violet on contact with a drop of alkaline Na2S solution .The violet colour is due to the formation ofa)[Fe(SCN)5NO]-b)[Fe(SCN)5NO]2-c)[Fe(CN)5NOS]4-d)[Fe(CN)5NOS]3-Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
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