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JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization

"S" के आकलन के दौरान, एक कार्बनिक यौगिक के 160 mg से 466 mg बेरियम सल्फेट प्राप्त होता है। दिए गए यौगिक में सल्फर का प्रतिशत _______ % है।
(दिया गया मोलर द्रव्यमान \(\mathrm{g} \mathrm{mol}^{-1}\) में: \(\mathrm{Ba}: 137, \mathrm{~S}: 32, {\mathrm{O}: 16}\) )

A 10
B 20
C 30
D 40

Verified Solution

Answer & Solution

Correct Answer

(D) 40

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \mathrm{m} \text { mole of } \mathrm{BaSO}_4=\text { mmoles of } \mathrm{S}=\frac{466}{233} \\ & \text { Mass of } \mathrm{S}=\frac{466}{233} \times 32 \mathrm{mg} \\ & =64 \mathrm{mg} \\ & \% \mathrm{~S}=\frac{64}{160} \times 100=40 \%\end{aligned}\)

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

सूची\(-I\) को सूची\(-II\) से मिलान कीजिए:-

सूची \(- I\)	सूची \(- II\)
\((A)\) \(\left[ PtCl _{4}\right]^{2-}\)	\((I)\) \(sp ^{3} d\)
\((B)\) \(BrF _{5}\)	\((II)\) \(d ^{2} sp ^{3}\)
\((C)\) \(PCl _{5}\)	\((III)\) \(dsp ^{2}\)
\((D)\) \(\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}\)	\((IV)\) \(sp ^{3} d ^{2}\)

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