1
WB JEE 2026
MCQ (Single Correct Answer)
+2
-0.5
Change Language

$$ \mathrm{RO}-\mathrm{CH}_2-\mathrm{C} \equiv \mathrm{CH} \xrightarrow{\mathrm{X}} \xrightarrow{\mathrm{Y}} \mathrm{RO}^{-} \mathrm{CH}_2-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_2 \mathrm{CH}_2-\mathrm{Br} $$

To carry out the above conversion X and Y are respectively

A

$\mathrm{NaNH}_2, \mathrm{Br}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl}$

B

$\mathrm{NaNH}_2, \mathrm{I}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}$

C

$\mathrm{NaNH}_2, \mathrm{~F}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}$

D

$\mathrm{NaNH}_2, \mathrm{CH}_2=\mathrm{CH}-\mathrm{Br}$

2
WB JEE 2026
MCQ (Single Correct Answer)
+2
-0.5
Change Language

WB JEE 2026 Chemistry - IUPAC Nomenclatures Question 1 English

A

1-Chloro-2-nitro-4-methylbenzene

B

1-Chloro-4-methyl-2-nitrobenzene

C

2-Chloro-1-nitro-5-methylbenzene

D

$m$-Nitro-p-chlorotoluene

3
WB JEE 2026
MCQ (More than One Correct Answer)
+2
-0
Change Language

Which of the following statement(s) is/are correct about the given compound?

WB JEE 2026 Chemistry - Biomolecules Question 1 English

A

It exhibits ring-chain tautomerism.

B

It forms osazone with phenylhydrazine.

C

It gives eight (8) stereoisomers.

D

It responds to Tollen's reagent.

4
WB JEE 2026
MCQ (More than One Correct Answer)
+2
-0
Change Language

1 mole of an ideal gas undergoes the following processes:

Process $A \rightarrow$ Isothermal expansion at 400 K from volume $\mathrm{V}_1$ to volume $\mathrm{V}_2$ ,such that $\mathrm{V}_2=4 \mathrm{~V}_1$

Process $B \rightarrow$ Adiabatic expansion from volume $\mathrm{V}_1$ to volume $\mathrm{V}_2$ ,such that $\mathrm{V}_2=4 \mathrm{~V}_1$

Consider the following statements and select the correct one/s.

A

Work done by gas in Process $A$ is greater than in Process $B$ .

B

Final temperature in Process $B$ is less than 400 K .

C

Change in internal energy is 0 in Process $A$ but non-zero in Process $B$ .

D

Heat absorbed by the gas is positive in Process $A$ but zero in Process $B$ .