JEE Main 2024 (Online) 6th April Morning Shift | Salt Analysis Question 20 | Chemistry

1

JEE Main 2024 (Online) 6th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	LIST I (Precipitating reagent and conditions)		LIST II (Cation)
A.	$$ \mathrm{NH}_4 \mathrm{Cl}+\mathrm{NH}_4 \mathrm{OH} $$	I.	$$\mathrm{Mn^{2+}}$$
B.	$$ \mathrm{NH}_4 \mathrm{OH}+\mathrm{Na}_2 \mathrm{CO}_3 $$	II.	$$\mathrm{Pb^{2+}}$$
C.	$$ \mathrm{NH}_4 \mathrm{OH}+\mathrm{NH}_4 \mathrm{Cl}+\mathrm{H}_2 \mathrm{~S} \text { gas } $$	III.	$$\mathrm{Al^{3+}}$$
D.	dilute $$\mathrm{HCl}$$	IV.	$$\mathrm{Sr^{2+}}$$

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

2

JEE Main 2024 (Online) 4th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :

A

decrease concentration of $${ }^{-} \mathrm{OH}$$ ions

B

increase concentration of $$\mathrm{Cl}^{-}$$ ions

C

prevent interference by phosphate ions

D

increase concentration of $$\mathrm{NH}_4{ }^{+}$$ ions

3

JEE Main 2024 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

+4

-1

The compound that is white in color is

A

ammonium sulphide

B

ammonium arsinomolybdate

C

lead iodide

D

lead sulphate

4

JEE Main 2024 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Given below are two statements :

Statement (I) : The gas liberated on warming a salt with dil $$\mathrm{H}_2 \mathrm{SO}_4$$, turns a piece of paper dipped in lead acetate into black, it is a confirmatory test for sulphide ion.

Statement (II) : In statement-I the colour of paper turns black because of formation of lead sulphite. In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both Statement I and Statement II are false

B

Statement I is true but Statement II is false

C

Both Statement I and Statement II are true

D

Statement I is false but Statement II is true

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