Principles Related to Practical Chemistry NEET PYQ

Q 1 :
Match List I with List II. [2025]

List I (Ion) List II (Group number in cation analysis)

A. ${Co}^{2 +}$ I. Group-I

B. ${Mg}^{2 +}$ II. Group-III

C. ${Pb}^{2 +}$ III. Group-IV

D. ${Al}^{3 +}$ IV. Group-VI

Choose the correct answer from the options given below:

A-III, B-II, C-IV, D-I
A-III, B-II, C-I, D-IV
A-III, B-IV, C-II, D-I
A-III, B-IV, C-I, D-II

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(4)

${Co}^{2 +}$ : Group – IV (A – III)
${Mg}^{2 +}$ : Group – VI (B – IV)
${Pb}^{2 +}$ : Group – I (C – I)
${Al}^{3 +}$ : Group – III (D – II)

Q 2 :
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.

A – IV, B – II, C – III, D – I
A – II, B – IV, C – III, D – I
A – II, B – III, C – IV, D – I
A – III, B – IV, C – II, D – I

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(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.

Q 3 :
Match List-I with List-II. [2024]

List-I
(Solid salt treated with dil. $H_{2} {SO}_{4}$ ) List-II
(Anion detected)

A. Effervescence of colourless gas I. ${NO}_{2}^{-}$

B. Gas with smell of rotten egg II. ${CO}_{3}^{2 -}$

C. Gas with pungent smell III. $S^{2 -}$

D. Brown fumes IV. ${SO}_{3}^{2 -}$

Choose the correct answer from the options given below:

A – II, B – III, C – IV, D – I
A – IV, B – III, C – II, D – I
A – I, B – II, C – III, D – IV
A – II, B – III, C – I, D – IV

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(1)

Experiment	Observation		Anion detected
Solid salt + dil. $H_{2} {SO}_{4}$	A.	Effervescence of colourless and odourless gas which turns lime water milky.	(II) ${CO}_{3}^{2 -}$ is confirmed.
	B.	Colourless gas with rotten egg smell and turns lead acetate paper black.	(III) $S^{2 -}$ is confirmed.
	C.	Colourless gas with pungent smell. Heat and pass the gas through acidified $K_{2} {Cr}_{2} O_{7}$ solution.	(IV) ${SO}_{3}^{2 -}$ is confirmed.
	D.	Colourless gas followed by brown gas (Brown fumes) and it turns ferrous sulphate solution black.	(I) ${NO}_{2}^{-}$ is confirmed.

Q 4 :
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of ${Fe}^{2 +}$ ion? [2024]

Dilute hydrochloric acid
Concentrated sulphuric acid
Dilute nitric acid
Dilute sulphuric acid

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(4)

Dilute sulphuric acid is typically added to aqueous solution of Mohr's salt in order to prevent the hydrolysis of ferrous sulphate.

Q 5 :
Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.

A. ${Al}^{3 +}$ B. ${Cu}^{2 +}$ C. ${Ba}^{2 +}$ D. ${Co}^{2 +}$ E. ${Mg}^{2 +}$

Choose the correct answer from the options given below: [2024]

B, A, D, C, E
B, C, A, D, E
E, C, D, B, A
E, A, B, C, D

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(1)

(A) ${Al}^{3 +}$ : Group III

(B) ${Cu}^{2 +}$ : Group II

(C) ${Ba}^{2 +}$ : Group V

(D) ${Co}^{2 +}$ : Group IV

(E) ${Mg}^{2 +}$ : Group VI

Topic Question Set

Q 1 :
Match List I with List II. [2025]

List I (Ion) List II (Group number in cation analysis)

A. ${Co}^{2 +}$ I. Group-I

B. ${Mg}^{2 +}$ II. Group-III

C. ${Pb}^{2 +}$ III. Group-IV

D. ${Al}^{3 +}$ IV. Group-VI

Choose the correct answer from the options given below:

Q 4 :
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of ${Fe}^{2 +}$ ion? [2024]

Q 5 :
Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.

A. ${Al}^{3 +}$ B. ${Cu}^{2 +}$ C. ${Ba}^{2 +}$ D. ${Co}^{2 +}$ E. ${Mg}^{2 +}$

Choose the correct answer from the options given below: [2024]

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	List I (Ion)		List II (Group number in cation analysis)
A.	${Co}^{2 +}$	I.	Group-I
B.	${Mg}^{2 +}$	II.	Group-III
C.	${Pb}^{2 +}$	III.	Group-IV
D.	${Al}^{3 +}$	IV.	Group-VI

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

	List-I (Solid salt treated with dil. $H_{2} {SO}_{4}$ )		List-II (Anion detected)
			List-II (Anion detected)
A.	Effervescence of colourless gas	I.	${NO}_{2}^{-}$
B.	Gas with smell of rotten egg	II.	${CO}_{3}^{2 -}$
C.	Gas with pungent smell	III.	$S^{2 -}$
D.	Brown fumes	IV.	${SO}_{3}^{2 -}$

Topic Question Set

Q 1 : Match List I with List II. [2025] List I (Ion) List II (Group number in cation analysis) A. Co2+ I. Group-I B. Mg2+ II. Group-III C. Pb2+ III. Group-IV D. Al3+ IV. Group-VI Choose the correct answer from the options given below:

Q 2 : 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.

Q 4 : During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe2+ ion? [2024]

Q 5 : Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI. A. Al3+ B. Cu2+ C. Ba2+ D. Co2+ E. Mg2+ Choose the correct answer from the options given below: [2024]

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Q 1 :
Match List I with List II. [2025]

List I (Ion) List II (Group number in cation analysis)

A. ${Co}^{2 +}$ I. Group-I

B. ${Mg}^{2 +}$ II. Group-III

C. ${Pb}^{2 +}$ III. Group-IV

D. ${Al}^{3 +}$ IV. Group-VI

Choose the correct answer from the options given below:

Q 4 :
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of ${Fe}^{2 +}$ ion? [2024]

Q 5 :
Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.

A. ${Al}^{3 +}$ B. ${Cu}^{2 +}$ C. ${Ba}^{2 +}$ D. ${Co}^{2 +}$ E. ${Mg}^{2 +}$

Choose the correct answer from the options given below: [2024]