JEE Main 2023 (Online) 29th January Morning Shift | Practical Organic Chemistry Question 34 | Chemistry | JEE Main - ExamSIDE.com

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1

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

A

$$\mathrm{NH_2OH.HCl}$$

B

$$\mathrm{N_2H_4.HCl}$$

C

$$\mathrm{CH_3NH_2.HCl}$$

D

$$\mathrm{NH_4Cl}$$

2

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

3

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

4

JEE Main 2022 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

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

A

quinonoid form

B

heterocyclic form

C

phenolic form

D

benzenoid form

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