JEE Main 2023 (Online) 30th January Morning Shift | Practical Organic Chemistry Question 34 | Chemistry

In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis?

Co²⁺

Ni²⁺

Zn²⁺

Fe³⁺

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

-1

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

$$\mathrm{NH_2OH.HCl}$$

$$\mathrm{N_2H_4.HCl}$$

$$\mathrm{CH_3NH_2.HCl}$$

$$\mathrm{NH_4Cl}$$

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

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

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

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

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

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

-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