Qualitative Analysis Of Elements In Organic Compounds

Question 1

Systematic Approach

Answer 1

Utilizes qualitative chemical reagents to identify elements in organic compounds.

Question 2

Organoleptic Approach

Answer 2

Involves observation and the use of the five senses.

Question 3

Carbon Dioxide (CO2) Detection

Answer 3

CO2 is detected by its reaction with lime water (calcium hydroxide), forming calcium carbonate (chalk white) and water

Question 4

Water (H2O) Detection

Answer 4

Water is detected using anhydrous cupric sulfate, which turns from white powder to blue.

Question 5

Lassaigne’s Test

Answer 5

Used to detect nitrogen, halogens, and sulfur in organic compounds by converting them to inorganic ions.

Question 6

Soda Lime Test

Answer 6

Detects amino nitrogen by heating, which liberates ammonia (pungent odor).

Question 7

Beilstein Test

Answer 7

Used to detect halogens, indicated by a green flame upon heating copper wire.

Question 8

Silver Nitrate Test

Answer 8

Halogens react with silver nitrate in the presence of dilute nitric acid, forming insoluble silver halide precipitates.

Question 9

Lead Acetate Test

Answer 9

Detects the presence of sulfur, resulting in a brownish-black precipitate.