1
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
The electrochemical extraction of aluminum from bauxite ore involves
A
the reaction of $\mathrm{Al}_{2} \mathrm{O}_{3}$ with coke $(\mathrm{C})$ at a temperature $>2500^{\circ} \mathrm{C}$.
B
the neutralization of aluminate solution by passing $\mathrm{CO}_{2}$ gas to precipitate hydrated alumina $\left(\mathrm{Al}_{2} \mathrm{O}_{3} \cdot 3 \mathrm{H}_{2} \mathrm{O}\right)$.
C
the dissolution of $\mathrm{Al}_{2} \mathrm{O}_{3}$ in hot aqueous $\mathrm{NaOH}$.
D
the electrolysis of $\mathrm{Al}_{2} \mathrm{O}_{3}$ mixed with $\mathrm{Na}_{3} \mathrm{AlF}_{6}$ to give $\mathrm{Al}$ and $\mathrm{CO}_{2}$.
2
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language
The treatment of galena with $\mathrm{HNO}_{3}$ produces a gas that is
A
paramagnetic
B
bent in geometry
C
an acidic oxide
D
colorless
3
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

Considering the reaction sequence given below, the correct statement(s) is(are)

JEE Advanced 2022 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 14 English

A
$\mathbf{P}$ can be reduced to a primary alcohol using $\mathrm{NaBH}_{4}$.
B
Treating $\mathbf{P}$ with conc. $\mathrm{NH}_{4} \mathrm{OH}$ solution followed by acidification gives $\mathbf{Q}$.
C
Treating $\mathbf{Q}$ with a solution of $\mathrm{NaNO}_{2}$ in aq. $\mathrm{HCl}$ liberates $\mathrm{N}_{2}$.
D
$\mathbf{P}$ is more acidic than $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}$.
4
JEE Advanced 2022 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

Considering the following reaction sequence,

JEE Advanced 2022 Paper 1 Online Chemistry - Compounds Containing Nitrogen Question 9 English

the correct option(s) is(are)

A
$\mathbf{P}=\mathrm{H}_{2} / \mathrm{Pd}$, ethanol     $\mathbf{R}=\mathrm{NaNO}_{2} / \mathrm{HCl}$      
$\mathbf{U}=1 . \mathrm{H}_{3} \mathrm{PO}_{2}$
         2. $\mathrm{KMnO}_{4}-\mathrm{KOH}$, heat
B
JEE Advanced 2022 Paper 1 Online Chemistry - Compounds Containing Nitrogen Question 9 English Option 2
C
JEE Advanced 2022 Paper 1 Online Chemistry - Compounds Containing Nitrogen Question 9 English Option 3
D
JEE Advanced 2022 Paper 1 Online Chemistry - Compounds Containing Nitrogen Question 9 English Option 4
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