Transition And Innertransition Elements
- Transition and InnerTransition Elements - Result Question 1
- Transition and InnerTransition Elements - Result Question 9 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 2
- Transition and InnerTransition Elements - Result Question 11 — JEE PYQ Chapterwise
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- Transition and InnerTransition Elements - Result Question 37
- Transition and InnerTransition Elements - Result Question 38
- Transition and InnerTransition Elements - Result Question 39 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 8
- Transition and InnerTransition Elements - Result Question 42
- Transition and InnerTransition Elements - Result Question 43
- Transition and InnerTransition Elements - Result Question 44
- Transition and InnerTransition Elements - Result Question 45
- Transition and InnerTransition Elements - Result Question 9 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 46 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 48 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 51 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 53
- Transition and InnerTransition Elements - Result Question 54
- Transition and InnerTransition Elements - Result Question 11 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 55
- Transition and InnerTransition Elements - Result Question 56 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 58 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 12
- Transition and InnerTransition Elements - Result Question 60
- Transition and InnerTransition Elements - Result Question 61 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 63 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 13
- Transition and InnerTransition Elements - Result Question 66
- Transition and InnerTransition Elements - Result Question 67
- Transition and InnerTransition Elements - Result Question 68
- Transition and InnerTransition Elements - Result Question 69
- Transition and InnerTransition Elements - Result Question 14
- Transition and InnerTransition Elements - Result Question 70
- Transition and InnerTransition Elements - Result Question 71
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- Transition and InnerTransition Elements - Result Question 73
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- Transition and InnerTransition Elements - Result Question 18
- Transition and InnerTransition Elements - Result Question 19
- Transition and InnerTransition Elements - Result Question 20
- Transition and InnerTransition Elements - Result Question 21
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- Transition and InnerTransition Elements - Result Question 31
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- Transition and InnerTransition Elements - Result Question 33
- Transition and InnerTransition Elements - Result Question 34
- Transition and InnerTransition Elements - Result Question 35
- Transition and InnerTransition Elements - Result Question 39 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 40
- Transition and InnerTransition Elements - Result Question 46 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 48 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 49
- Transition and InnerTransition Elements - Result Question 51 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 56 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 58 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 61 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 63 — JEE PYQ Chapterwise
- Transition and InnerTransition Elements - Result Question 64
- Transition and InnerTransition Elements - Result Question 74
Transition and InnerTransition Elements - Result Question 61 — JEE PYQ Chapterwise
62. Consider the following list of reagents, acidified $K _2 Cr _2 O _7$, alkaline $KMnO _4, CuSO _4, H _2 O _2, Cl _2, O _3, FeCl _3, HNO _3$ and $Na _2 S _2 O _3$. The total number of reagents that can oxidise aqueous iodide to iodine is
(2014 Adv.)
Show Answer
Answer:
Correct Answer: 62. (7)
Solution:
Acidified $K _2 Cr _2 O _7, CuSO _4, H _2 O _2, Cl _2, O _3, FeCl _3$ and $HNO _3$ oxidise aq. iodide to iodine. Alkaline $KMnO _4$ oxidise aq. iodide to $IO _3^{-}$. $Na _2 S _2 O _3$ is a strong reducing agent which on reaction with $I _2$ produces $I^{-}$.
$ Na _2 S _2 O _3+I _2 \longrightarrow 2 I^{-}+Na _2 S _4 O _6 $
Therefore, no reaction takes place between $Na _2 S _2 O _3$ and iodide ion.
Hence, correct integer is (7).
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