JEE Main 2024 (Online) 8th April Evening Shift | Practical Organic Chemistry Question 5 | Chemistry

1

JEE Main 2024 (Online) 8th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	LIST I (Test)		LIST II (Identification)
A.	Bayer's test	I.	Phenol
B.	Ceric ammonium nitrate test	II.	Aldehyde
C.	Phthalein dye test	III.	Alcoholic-OH group
D.	Schiff's test	IV.	Unsaturation

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

2

JEE Main 2024 (Online) 8th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	LIST I (Name of the test)		LIST II (Reaction sequence involved) [M is metal]
A.	Borax bead test	I.	$$\mathrm{MCO}_3 \rightarrow \mathrm{MO} \xrightarrow[+\Delta]{\mathrm{Co}\left(\mathrm{NO}_3\right)_2} \mathrm{CoO} \cdot \mathrm{MO}$$
B.	Charcoal cavity test	II.	$$\mathrm{MCO}_3 \rightarrow \mathrm{MCl}_2 \rightarrow \mathrm{M}^{2+}$$
C.	Cobalt nitrate test	III.	$$\mathrm{MSO}_4 \xrightarrow[\Delta]{\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7} \mathrm{M}\left(\mathrm{BO}_2\right)_2 \rightarrow \mathrm{MBO}_2 \rightarrow \mathrm{M}$$
D.	Flame test	IV.	$$\mathrm{MSO}_4 \xrightarrow[\Delta]{\mathrm{Na}_2 \mathrm{CO}_3} \mathrm{MCO}_3 \rightarrow \mathrm{MO} \rightarrow \mathrm{M}$$

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

3

JEE Main 2024 (Online) 6th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in $$\mathrm{NH}_4 \mathrm{OH}$$ solution when sodium carbonate extract was first acidified with dil. $$\mathrm{HNO}_3$$ and then $$\mathrm{AgNO}_3$$ solution was added. This indicates presence of :

A

$$\mathrm{I}^{-}$$

B

$$\mathrm{CO}_3{ }^{2-}$$

C

$$\mathrm{Cl}^{-}$$

D

$$\mathrm{Br}^{-}$$

4

JEE Main 2024 (Online) 6th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

The correct statement among the following, for a "chromatography" purification method is :

A

$$\mathrm{R}_f$$ of a polar compound is smaller than that of a non-polar compound.

B

Non-polar compounds are retained at top and polar compounds come down in column chromatography.

C

Organic compounds run faster than solvent in the thin layer chromatographic plate.

D

$$\mathrm{R}_f$$ is an integral value.