1
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 28 English

Identify B and C and how are A and C related?

A
JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 28 English Option 1
B
JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 28 English Option 2
C
JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 28 English Option 3
D
JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 28 English Option 4
2
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the correct set of reagents or reaction conditions '$$X$$' and '$$Y$$' in the following set of transformation.

JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Haloalkanes and Haloarenes Question 27 English

A
$$\mathrm{X}=$$ dil.aq. $$\mathrm{NaOH}, 20^{\circ} \mathrm{C}, \quad \mathrm{Y}=\mathrm{HBr} /$$ acetic acid
B
$$\mathrm{X}=$$ conc.alc. $$\mathrm{NaOH}, 80^{\circ} \mathrm{C}, \mathrm{Y}=\mathrm{Br}_2 / \mathrm{CHCl}_3$$
C
$$\mathrm{X}=$$ dil.aq. $$\mathrm{NaOH}, 20^{\circ} \mathrm{C}, \quad \mathrm{Y}=\mathrm{Br}_2 / \mathrm{CHCl}_3$$
D
$$\mathrm{X}=$$ conc.alc. $$\mathrm{NaOH}, 80^{\circ} \mathrm{C}, \mathrm{Y}=\mathrm{HBr} /$$ acetic acid
3
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :

A
decrease concentration of $${ }^{-} \mathrm{OH}$$ ions
B
increase concentration of $$\mathrm{Cl}^{-}$$ ions
C
prevent interference by phosphate ions
D
increase concentration of $$\mathrm{NH}_4{ }^{+}$$ ions
4
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The element which shows only one oxidation state other than its elemental form is :

A
Nickel
B
Titanium
C
Cobalt
D
Scandium
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