JEE Main 2023 (Online) 29th January Morning Shift | Practical Organic Chemistry Question 35 | Chemistry | JEE Main - ExamSIDE.com

Joint Entrance Examination

Medical

Graduate Aptitude Test in Engineering

Civil Services

Defence

CBSE

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

JEE Main Subjects

EXAM MAP

Joint Entrance Examination

JEE Main JEE Advanced WB JEE BITSAT MHT CET KCET COMEDK VITEEE AP EAPCET

Medical

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

Civil Services

UPSC Civil Service

Defence

CBSE