Match List-I with List-II: Test/Reagents/Observation, Species detected
List-I
Test/Reagents/Observation(s)
List-II
Species detected
(a) Lassaigne’s Test
(i) Carbon
(b) Cu(II) oxide
(ii) Sulphur
(c) Silver nitrate
(iii) N, S, P and halogen
(d) The sodium fusion extract gives black precipitate with acetic acid & lead acetate
(iv) Halogen Specifically
Match List-I with List-II: Test/Reagents/Observation, Species detected
List-I Test/Reagents/Observation(s) | List-II Species detected |
(a) Lassaigne’s Test | (i) Carbon |
(b) Cu(II) oxide | (ii) Sulphur |
(c) Silver nitrate | (iii) N, S, P and halogen |
(d) The sodium fusion extract gives black precipitate with acetic acid & lead acetate | (iv) Halogen Specifically |
The correct option is A (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
The explanation for correct option:
(A)(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
(a)Lassaigne’s Test-(iii) N, S, P and halogen
Lassaigne's test can identify the presence of nitrogen, sulfur, and halogens in organic molecules. Here, the organic compound is heated in a fusion tube together with a little piece of Na metal. The idea is that by doing this, Na changes every element in the vicinity into an ionic form.
The fused material is boiled with distilled water to release the generated ionic salts. The term for this is sodium fusion extract.
(b)Cu(II) oxide-(i) Carbon
Testing for carbon involves heating a substance with (ii) oxide of copper.
(c )Silver nitrate-(iv) Halogen Specifically
A common test to identify the type of halogen present in a halogenated alkene is the silver nitrate test. Silver nitrate becomes acidic with the addition of dilute nitric acid during the test.
(d) The sodium fusion extract gives a black precipitate with acetic acid & lead acetate-(ii) Sulphur
Acetic acid is used to acidify the sodium fusion extract, and when lead acetate is added, a black precipitate of lead sulfide is formed, indicating the presence of sulfur.
Hence, option (a) is correct.
List (i) List (ii) (a)Lassaigne’s Test (iii) N, S, P and halogen (b)Cu(II) oxide (i) Carbon (c )Silver nitrate (iv) Halogen Specifically (d) The sodium fusion extract gives a black precipitate with acetic acid & lead acetate (ii) Sulphur
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
The explanation for correct option:
(A)(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
(a)Lassaigne’s Test-(iii) N, S, P and halogen
Lassaigne's test can identify the presence of nitrogen, sulfur, and halogens in organic molecules. Here, the organic compound is heated in a fusion tube together with a little piece of Na metal. The idea is that by doing this, Na changes every element in the vicinity into an ionic form.
The fused material is boiled with distilled water to release the generated ionic salts. The term for this is sodium fusion extract.
(b)Cu(II) oxide-(i) Carbon
Testing for carbon involves heating a substance with (ii) oxide of copper.
(c )Silver nitrate-(iv) Halogen Specifically
A common test to identify the type of halogen present in a halogenated alkene is the silver nitrate test. Silver nitrate becomes acidic with the addition of dilute nitric acid during the test.
(d) The sodium fusion extract gives a black precipitate with acetic acid & lead acetate-(ii) Sulphur
Acetic acid is used to acidify the sodium fusion extract, and when lead acetate is added, a black precipitate of lead sulfide is formed, indicating the presence of sulfur.
Hence, option (a) is correct.
| List (i) | List (ii) |
| (a)Lassaigne’s Test | (iii) N, S, P and halogen |
| (b)Cu(II) oxide | (i) Carbon |
| (c )Silver nitrate | (iv) Halogen Specifically |
| (d) The sodium fusion extract gives a black precipitate with acetic acid & lead acetate | (ii) Sulphur |
