1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Which of the following ethers cannot be prepared efficiently by Williamson synthesis?

A

Ethyl phenyl ether

B

Methyl tert-butyl ether

C

n-butyl methyl ether

D

Benzyl propyl ether

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Among the following, the species having same bond order are

A

$\mathrm{NO}^{+}$and $\mathrm{CN}^{-}$

B

CO and $\mathrm{O}_2^{-}$

C

$\mathrm{O}_2^{-}$and NO

D

$\mathrm{CN}^{-}$and $\mathrm{O}_2$

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Arrange the energy of $2 s$ orbitals in increasing order for the atoms $\mathrm{C}, \mathrm{B}, \mathrm{N}$ and O .

A

$E_{2 s}(\mathrm{O}) < E_{2 s}(\mathrm{~N}) < E_{2 s}(\mathrm{C}) < E_{2 s}(\mathrm{~B})$

B

$E_{2 s}(\mathrm{~B}) < E_{2 s}(\mathrm{C}) < E_{2 s}(\mathrm{~N}) < E_{2 s}(\mathrm{O})$

C

$E_{2 s}(\mathrm{~N})< E_{2 s}(\mathrm{O})< E_{2 s}(\mathrm{~B})< E_{2 s}(\mathrm{C})$

D

$E_{2 s}(\mathrm{C})< E_{2 s}(\mathrm{~B})< E_{2 s}(\mathrm{O})< E_{2 s}(\mathrm{~N})$

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Identify the final product $C$ in the following sequence.

$$ \begin{aligned} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}+(\text { alc. } \mathrm{KOH}) & \xrightarrow{h \nu} A+\mathrm{Br}_2 \longrightarrow B+(\text { alc. } \mathrm{KCN}) \longrightarrow C \end{aligned} $$

A

$\mathrm{CH}_2=\mathrm{CHCN}$

B

$\mathrm{CH}_3 \mathrm{CHBrCN}$

C

$\mathrm{CHBr}=\mathrm{CHCN}$

D

$\mathrm{CH}_2 \mathrm{BrCH}_2 \mathrm{CN}$

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