NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Redox Reactions
NEET · Chemistry · Redox Reactions
Given below are two statements; one is labelled as Assertion (A)...
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason(R) .
Assertion :- The average oxidation no. of sulphur in (\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6) is 2.5
Reason :- Two S-atoms are not directly linked with O -atoms.
In the light of the above statements, choose the most appropriate answer from the options given below :
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A).
- B(A) is correct but (R) is not correct.
- C(A) is not correct but (R) is correct.
- DBoth (A) and (R) are correct and (R) is the correct explanation of (A).
Correct answer
B. (A) is correct but (R) is not correct.
Step-by-step solution
- Assertion (A): Correct. In (\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6) (tetrathionate ion), the average oxidation state of sulfur is indeed +2.5.
- Reason (R): Incorrect. The fact that two sulfur atoms are not directly linked with oxygen atoms is unrelated to the calculation of the average oxidation state. The average oxidation number is determined by the overall structure and oxidation states of individual sulfur atoms, not by their direct linkage to oxygen.
Thus, (A) is correct but (R) is not correct.