Experiment No 8 : To identify the given organic drug D5 by Systematic Qualitative Analysis.


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Experiment no 8

Questions

1. What precaution you will take for detection of halogens in elemental analysis, if the compound contains "N" and/or "S"?

2. Give the test for detection of "N" and "S" together in elemental

analysis?

3. Write chemical equations for detection of "N" "S" and halogens in the elemental analysis?

4. What is difference between acetic acid and glacial acetic acid?

 

Answers

Q.  1I Ans → It is a general best for the detection of halogens. Nitrogen and sulphur in an organic compound These elements the covalently borded to the organic ampound. In order to delect them these have to be converted into their tonic forms This is done by fusing the organic compounds with sodium Metal

 

Q .2 Ans→ Lassaignets test 18 used for the detection of elements –

Nitrogen (N& Sulphur (s). Chloridee (Cl) Bromine (Br) and Iodine (I)

 

Q .2. Ans. lassarg's Pest –

 In Lassang ar's test. The organic compound is mixed with Sodium and fused strongly.

 

rescut NaOH à  fe(OH)₂ + Na₂ so4

6 NaCN + Fe(OH) ₂ à Na4 ( fe (CN)6) – sodium ferocynate

 

3 Na4 (fe(CN)6) +4fecl à [Fe4 (fe (CN)6)3 +12Na ferric ferro cynide (prussion blu

e).