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Sclecr the corrcet srarcmenrs ahour $\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}, 5 \mathrm{I} 1, \mathrm{O}$. (a) It cannot used to remove stains of $\mathrm{I}_{2}$. (b) It is also called as hypo. (c) It can be used as antichlor. (d) Ir is used in phocog mphy ro form complex wirh AgBr.

K two Cr awful gives a yellow precipitated it's a yellow policy heated on reaction with on reaction with Be a two plus, as well as B B two plus, therefore, option C and option the uh, correct answer for this problem, Option C and option B. R. Correct answer for this problem.

Now in this part we are asked to find out the yellow respect. You'll notice right the sequence of the reactions of the year being N no three or two. This upon hating will produce. Yeah, mm. No, this is a fun reaction were diluted. Well you the the L two. No, we have video on reaction with alimony, um ammonium carbonate, ammonia carbonate. This will produce, he is C. 03 This is uh now this upon reaction will dilute at cl will produce S E L two B S C L two. Upon reaction with potassium promenade this will produce E A R Bs er of or no B S C R. O. For upon reaction with dilute sulfuric acid, it is a source of work. It will produce B. A. S. Awful. So this is Yeah, this is the better answer. E. S. 04 Yeah. So far is there direct And and this is this is the final product. But we're asked to find out the yellow pre speed. So this is the yellow principle. Hello, is it the B A c R 04? P a c R O Forest to Yellow Pre spirits. So let's check out the options. We see. Obscenity is going to Son. He is going to B S c R 04 is uh, yellow precipitate.

So first off, for all of these were gonna be starting with this compound. So I just want you to keep that in mind as we go along here. Okay? So for a we'd for 1st 3 that compound with H to give us the whiteness in a plus plus h two. And we would treat that, um then with ch three, we are, and that will give us our desire product. And for B, we're gonna start same compound, treat it with CIO cio three and purity, and that will give us styrene. Then we would treat that with rco three h and we get the desired product, which is fennel epoxy ethane. Now for C treat the molecule above with first H d o c o c a 32 with c h three to see i and second with in a beach for and they'll give us our final product, which is tart beetle. One Central Ethel, either. And lastly for deal start to product or the mark you above treated with PBR three to give us that. And then he treated with that to give us our one fennel ethane. The, um they feel

In this problem, I'm writing the reaction. Just look at it carefully. 903 Plus two i 2. It is dry. We will react to give the productive I food oh nine Plus nine or 2. Therefore, Here I four or 9 is produced when odeon react with dry i Odeen along with oxygen gas. Therefore, according to the given option, option A each correct and said for this problem, I hope you understand the solution of this problem.