JEE Mains · Chemistry · STD 12 - 8.2 Carboxylic acids and their derivative

एक कार्बनिक यौगिक \([A]\) जिसका अणुसूत्र \(C _{10} H _{20} O _{2}\) है तनु सल्फ्यूरिक अम्ल के साथ जल अपघटित करने पर एक कार्बाक्सिलिक अम्ल \([ B ]\) तथा एक ऐल्कोहॉल \([ C ]\) देता है। \([C]\) का \(CrO _{3}- H _{2} SO _{4}\) के साथ ऑक्सीकरण \([B]\) उत्पन्न किया। निम्न संरचनाओं में से कौनसी, \([A]\) के लिये संभव नहीं है ?

A \(\left( CH _{3}\right)_{3}- C - COOCH _{2} C \left( CH _{3}\right)_{3}\)
B \(CH _{3} CH _{2} CH _{2} COOCH _{2} CH _{2} CH _{2} CH _{3}\)
C \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ {C{H_3} - C{H_2} - CH - OCOC{H_2}CH - C{H_2}C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \end{array}\)
D \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ {C{H_3} - C{H_2} - CH - COOC{H_2} - CH - C{H_2}C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \end{array}\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(\begin{array}{*{20}{c}} {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\ {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ {C{H_3} - C{H_2} - CH - OCOC{H_2}CH - C{H_2}C{H_3}} \\ {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \end{array}\)

Step-by-step Solution

Detailed explanation

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.

Same subject

\(X\) के \(4 \%\) जलीय विलयन का हिमांक, \(Y\) के \(12 \%\) जलीय विलयन के हिमांक के बराबर है। यदि \(X\) का अणुभार \(A\) है तो \(Y\) का अणुभार ............\(A\) होगा :

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सूची-I को सूची-II से सुमेलित कीजिए।

सूची-I (वर्ग)	सूची-II (तत्व का प्रतीक)
(A) निक्टोजन (वर्ग 15)	(I) Ts
(B) चैल्कोजन	(II) Og
(C) हैलोजन	(III) Lv
(D) उत्कृष्ट गैस	(IV) Mc

नीचे दिए गए विकल्पों में से सही उत्तर चुनिए :

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