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Model Paper 9 — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryModel Paper 91 Mark
MCQ
Assertion (A): Sulphur present in an organic compound can be estimated quantitatively by Carius method.
Reason (R): Sulphur can be separated easily from other atoms in the molecule, by lassiagn's test, but the yellow precipitate cannot be obtained.
  • A
    A is correct and R is not correct.
  • B
    Both A and R are correct and R is the correct explanation of A.
  • C
    Both A and R are correct but R is not the correct explanation of A.
  • ✓
    A is not correct but R is correct.
✓

Answer

Correct option: D.
A is not correct but R is correct.
(d) A is not correct but R is correct.
Explanation: We know that the Carius method is used to estimate the halogen quantity, hence assertion is found to be wrong. Now reason, Sulphur can be separated easily from other atoms in the molecule, by lassiagn's test, but the yellow precipitate cannot be obtained.

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