JEE Main 2023 (Online) 25th January Morning Shift | Salt Analysis Question 31 | Chemistry

1

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List I Elements		List II Colour imparted to the flame
A.	K	I.	Brick Red
B.	Ca	II.	Violet
C.	Sr	III.	Apple Green
D.	Ba	IV.	Crimson Red

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

2

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match the List-I with List-II :

	List-I Cations		List-II Group reagents
A.	$$\mathrm{Pb^{2+},Cu^{2+}}$$	i)	$$\mathrm{H_2S}$$ gas in presence of dilute HCl
B.	$$\mathrm{Al^{3+},Fe^{3+}}$$	ii)	$$\mathrm{(NH_4)_2CO_3}$$ in presence of $$\mathrm{NH_4OH}$$
C.	$$\mathrm{Co^{2+},Ni^{2+}}$$	iii)	$$\mathrm{NH_4OH}$$ in presence of $$\mathrm{NH_4Cl}$$
D.	$$\mathrm{Ba^{2+},Ca^{2+}}$$	iv)	H₂S in presence of NH₄OH

Correct match is -

A

A $$\to$$ i, B $$\to$$ iii, C $$\to$$ iv, D $$\to$$ ii

B

A $$\to$$ i, B $$\to$$ iii, C $$\to$$ ii, D $$\to$$ iv

C

A $$\to$$ iii, B $$\to$$ i, C $$\to$$ iv, D $$\to$$ ii

D

A $$\to$$ iv, B $$\to$$ ii, C $$\to$$ iii, D $$\to$$ i

3

JEE Main 2022 (Online) 29th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

A white precipitate was formed when BaCl₂ was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is

A

I^$$-$$

B

SO₃^2$$-$$

C

S^2$$-$$

D

NO₂^$$-$$

4

JEE Main 2022 (Online) 27th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II.

	List-I (Anion)		List-II (gas evolved on reaction with dil.H$$_2$$SO$$_2$$)
(A)	CO$${_3^{2 - }}$$	I.	Colourless gas which turns lead acetate paper black.
(B)	S$$^{2 - }$$	II.	Colourless gas which turns acidified potassium dichromate solution green.
(C)	SO$${_3^{2 - }}$$	III.	Brown fumes which turns acidified KI solution containing starch blue.
(D)	NO$${_2^ - }$$	IV.	Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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