JEE Main 2023 (Online) 25th January Morning Shift | Salt Analysis Question 23 | Chemistry

1

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

2

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^$$-$$

3

JEE Main 2022 (Online) 25th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

During halogen test, sodium fusion extract is boiled with concentrated HNO₃ to

A

remove unreacted sodium

B

decompose cyanide or sulphide of sodium

C

extract halogen from organic compound

D

maintain the pH of extract.

4

JEE Main 2022 (Online) 24th June Evening Shift

MCQ (Single Correct Answer)

+4

-1

In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

A

Cu²⁺

B

Sr²⁺

C

Ba²⁺

D

Ca²⁺