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Which of the statements is not true? [2012]
- a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.
- b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.
- c)K2Cr2O7 solution in acidic medium is orange.
- d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the statements is not true? [2012]a)On passing H2S through ac...
Na2Cr2O7 is hygroscopic.
Most Upvoted Answer
Which of the statements is not true? [2012]a)On passing H2S through ac...
Explanation:
The statement that is not true is option B: Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.
Reasoning:
Volumetric analysis is a technique used in quantitative chemical analysis to determine the concentration or amount of a substance in a sample. It involves the use of a titrant, a solution of known concentration, to react with the analyte, the substance being analyzed.
Comparison between Na2Cr2O7 and K2Cr2O7:
Both Na2Cr2O7 (sodium dichromate) and K2Cr2O7 (potassium dichromate) are commonly used as oxidizing agents in volumetric analysis. However, there are some differences between the two compounds that may make one more suitable for a specific analysis than the other.
Solubility:
Na2Cr2O7 is more soluble in water than K2Cr2O7. This higher solubility can be advantageous in cases where a larger volume of titrant solution is required.
Sensitivity:
K2Cr2O7 is more sensitive to reducing agents than Na2Cr2O7. This means that K2Cr2O7 can react with a wider range of reducing agents and is therefore more versatile in its applications.
Stability:
K2Cr2O7 is generally more stable than Na2Cr2O7. This stability can be advantageous in cases where the titrant solution needs to be stored for a longer period of time without degradation.
Preference:
The choice between Na2Cr2O7 and K2Cr2O7 in volumetric analysis depends on the specific requirements of the analysis. In some cases, Na2Cr2O7 may be preferred due to its higher solubility, while in other cases, K2Cr2O7 may be preferred due to its higher sensitivity. Therefore, it is not accurate to say that one compound is universally preferred over the other in all volumetric analysis procedures.
Conclusion:
Based on the above reasoning, the statement that Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis is not true. The choice between the two compounds depends on the specific requirements of the analysis.
The statement that is not true is option B: Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.
Reasoning:
Volumetric analysis is a technique used in quantitative chemical analysis to determine the concentration or amount of a substance in a sample. It involves the use of a titrant, a solution of known concentration, to react with the analyte, the substance being analyzed.
Comparison between Na2Cr2O7 and K2Cr2O7:
Both Na2Cr2O7 (sodium dichromate) and K2Cr2O7 (potassium dichromate) are commonly used as oxidizing agents in volumetric analysis. However, there are some differences between the two compounds that may make one more suitable for a specific analysis than the other.
Solubility:
Na2Cr2O7 is more soluble in water than K2Cr2O7. This higher solubility can be advantageous in cases where a larger volume of titrant solution is required.
Sensitivity:
K2Cr2O7 is more sensitive to reducing agents than Na2Cr2O7. This means that K2Cr2O7 can react with a wider range of reducing agents and is therefore more versatile in its applications.
Stability:
K2Cr2O7 is generally more stable than Na2Cr2O7. This stability can be advantageous in cases where the titrant solution needs to be stored for a longer period of time without degradation.
Preference:
The choice between Na2Cr2O7 and K2Cr2O7 in volumetric analysis depends on the specific requirements of the analysis. In some cases, Na2Cr2O7 may be preferred due to its higher solubility, while in other cases, K2Cr2O7 may be preferred due to its higher sensitivity. Therefore, it is not accurate to say that one compound is universally preferred over the other in all volumetric analysis procedures.
Conclusion:
Based on the above reasoning, the statement that Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis is not true. The choice between the two compounds depends on the specific requirements of the analysis.
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Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer?.
Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the statements is not true? [2012]a)On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.b)Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.c)K2Cr2O7 solution in acidic medium is orange.d)K2 Cr2O7 solution becomes yellow on increasing the pH beyond 7.Correct answer is option 'B'. Can you explain this answer?.
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