JEE Main 2023 (Online) 25th January Morning Shift | Practical Organic Chemistry Question 37 | Chemistry

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

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

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

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

JEE Main 2022 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

-1

In base vs. acid titration, at the end point methyl orange is present as

quinonoid form

heterocyclic form

phenolic form

benzenoid form

JEE Main 2022 (Online) 30th June Morning Shift

MCQ (Single Correct Answer)

-1

The reagent neutral ferric chloride is used to detect the presence of ______________

sulphide ion and alcoholic $$-$$OH group.

acetate ion and phenolic $$-$$OH group.

sulphide ion and phenolic $$-$$OH group.

acetate ion and alcoholic $$-$$OH group.

JEE Main 2022 (Online) 29th June Evening Shift

MCQ (Single Correct Answer)

-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

I^$$-$$

SO₃^2$$-$$

S^2$$-$$

NO₂^$$-$$

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