Q. 39

Three students, M

Answer :

As we know that theLassaigne’s extract is prepared to detect the presence of N, S, Halogens and P.

As when the Lassaigne’s extract is prepared, it allows all the elements present in the particular compound to come into the elemental state, so that they can easily be detected.


Now, the reaction involved is for Nitrogen estimation:


Na + C + N NaCN


NaCN + FeSO4 + dilute sulphuric Fe4[FeCN6]3 (Prussian blue colour solution)


The reaction involved is for sulphur estimation:


Na + C + N + S NaCNS


3NaCNS + FeSO4 + dilute sulphuric Fe(CNS)3 (Blood red colour) + 3Na+


Hence, the Ramesh has N as well as S present in his organic compound so, he was getting the Blood red colour of Fe(CNS)3 and Manish and Rajni were having only Nitrogen in their compound, hence they got Prussian blue colour.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Discuss the princNCERT - Chemistry Part-II

Differentiate betNCERT - Chemistry Part-II

In the Lassaigne’NCERT - Chemistry Part-II

Explain, why an oNCERT - Chemistry Part-II

Discuss the chemiNCERT - Chemistry Part-II

Will CCl4</sNCERT - Chemistry Part-II