Match List-I with List-II. Lake Test, Principles Related to Practical Chemistry [2024]

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Q.
Match List-I with List-II. [2024]

List-I (Test/ reagent) List-II (Radical identified)

A. Lake Test I. ${NO}_{3}^{-}$

B. Nessler’s Reagent II. ${Fe}^{3 +}$

C. Potassium sulphocyanide III. ${Al}^{3 +}$

D. Brown Ring Test IV. ${NH}_{4}^{+}$

Choose the correct answer from the options given below.

1 A – IV, B – II, C – III, D – I

2 A – II, B – IV, C – III, D – I

3 A – II, B – III, C – IV, D – I

4 A – III, B – IV, C – II, D – I

Ans.
(4)

Test/Reagent

Observation

Inference

Lake test

A blue floating precipitate is obtained.

${Al}^{3 +}$ is confirmed.

Nessler’s reagent $(K_{2} {HgI}_{4})$

Brown solution or ppt. is obtained.

${NH}_{4}^{+}$ is confirmed.

Potassium sulphocyanide (Potassium thiocyanate, KCNS)

Blood red colour is obtained.

${Fe}^{3 +}$ is confirmed.

Brown ring test

A brown ring is formed at the junction of two liquids.

${NO}_{3}^{-}$ is confirmed.

Solution

1 A – IV, B – II, C – III, D – I

2 A – II, B – IV, C – III, D – I

3 A – II, B – III, C – IV, D – I

4 A – III, B – IV, C – II, D – I

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	List-I (Test/ reagent)		List-II (Radical identified)
A.	Lake Test	I.	${NO}_{3}^{-}$
B.	Nessler’s Reagent	II.	${Fe}^{3 +}$
C.	Potassium sulphocyanide	III.	${Al}^{3 +}$
D.	Brown Ring Test	IV.	${NH}_{4}^{+}$

Test/Reagent	Observation	Inference
Lake test	A blue floating precipitate is obtained.	${Al}^{3 +}$ is confirmed.
Nessler’s reagent $(K_{2} {HgI}_{4})$	Brown solution or ppt. is obtained.	${NH}_{4}^{+}$ is confirmed.
Potassium sulphocyanide (Potassium thiocyanate, KCNS)	Blood red colour is obtained.	${Fe}^{3 +}$ is confirmed.
Brown ring test	A brown ring is formed at the junction of two liquids.	${NO}_{3}^{-}$ is confirmed.

Solution

Q. Match List-I with List-II. [2024] List-I (Test/ reagent) List-II (Radical identified) A. Lake Test I. NO3- B. Nessler’s Reagent II. Fe3+ C. Potassium sulphocyanide III. Al3+ D. Brown Ring Test IV. NH4+ Choose the correct answer from the options given below.

1 A – IV, B – II, C – III, D – I

2 A – II, B – IV, C – III, D – I

3 A – II, B – III, C – IV, D – I

4 A – III, B – IV, C – II, D – I

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