TS EAMCET · Chemistry · Hydrocarbons

When propyne is passed through a red hot iron tube at $873 K,$ the reaction gives product having molecular formula of

A $C_{7} H_{8}$
B $C_{9} H_{12}$
C $C_{8} H_{10}$
D $C_{6} H_{6}$

Verified Solution

Answer & Solution

Correct Answer

(B) $C_{9} H_{12}$

Step-by-step Solution

Detailed explanation

When propyne reacts with the hot iron tube at high temperature then it formed the aromatic compound. The aromatic compound is mesitylene. It's another name is1,3,5-trimethylbenzene. It has the molecular formula of C9H12 Reaction :-

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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When propyne is passed through a red hot iron tube at 873 K, the reaction gives product having molecular formula of

Step-by-step Solution

When propyne is passed through a red hot iron tube at $873 K,$ the reaction gives product having molecular formula of