JEE Main 2023 (Online) 11th April Morning Shift | Salt Analysis Question 7 | Chemistry

1

JEE Main 2023 (Online) 11th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral $$\mathrm{FeCl}_{3}$$, it gave deep red colour which disppeared on boiling and a brown red ppt was formed. The mixture contains :

A

SO$$_3^{2-}$$ & C$$_2$$O$$_4^{2-}$$

B

$$\mathrm{CH}_{3} \mathrm{COO}^{-} \& ~\mathrm{NO}_{3}^{-}$$

C

$$\mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-} \& ~\mathrm{NO}_{3}^{-}$$

D

$$\mathrm{SO}_{3}^{2-} \& ~\mathrm{CH}_{3} \mathrm{COO}^{-}$$

2

JEE Main 2023 (Online) 6th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Formation of which complex, among the following, is not a confirmatory test of $$\mathrm{Pb}^{2+}$$ ions :

A

lead chromate

B

lead iodide

C

lead sulphate

D

lead nitrate

3

JEE Main 2023 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

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?

A

Co²⁺

B

Ni²⁺

C

Zn²⁺

D

Fe³⁺

4

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