Q 1 :

Given below are two statements :                                              [2025]

Statement (I): Neopentane forms only one monosubstituted derivative.

Statement (II): Melting point of neopentane is higher than $n$-pentane.

In the light of the above statements, choose the most appropriate answer from the options given below :

• Statement I is correct but Statement II is incorrect

   

• Both Statement I and Statement II are correct

   

• Both Statement I and Statement II are incorrect

   

• Statement I is incorrect but Statement II is correct

   

Q 2 :

Isomeric hydrocarbons → negative Baeyer’s test (Molecular formula ${\mathrm{C}}_9{\mathrm{H}}_{12}$)

The total number of isomers from above with four different non-aliphatic substitution sites is _____.            [2025]

Q 3 :

Which of the following reaction is NOT correctly represented? [2026]

Q 4 :

The dibromo compound [P] (molecular formula : ${\mathrm{C}}_9{\mathrm{H}}_{10}{\mathrm{Br}}_2$) when heated with excess sodamide followed by treatment with dilute HCl gives [Q]. On warming [Q] with mercuric sulphate and dilute sulphuric acid yield [R] which gives positive Iodoform test but negative Tollen’s test. The compound [P] is :          [2026]

Q 5 :

Given below are two statements for the following reaction sequence.

Statement I: Compound ‘Z’ will give yellow precipitate with NaOI.
Statement II: Compound ‘Q’ has two different types of ‘H’ atoms (aromatic : aliphatic) in the ratio 1:3.

In the light of the above statements, choose the correct answer from the options given below:     [2026]

• Both Statement I and Statement II are true

   

• Statement I is false but Statement II is true

   

• Both Statement I and Statement II are false

   

• Statement I is true but Statement II is false

   

Q 6 :

R is

• Anisole

   

• Phenol

   

• Alcohol

   

• Toludine

   

Q 7 :

$x\left(C_7{H}_{12}\right)\stackrel{O_3}{\to }\stackrel{\mathrm{Zn}-{\mathrm{H}}_2\mathrm{O}}{\to }A$

Then $x$ is?

Q 8 :

Consider the following statements about propyne:

A) It decolourises the colour of Baeyer’s reagent.

B) It liberates hydrogen gas on reaction with sodium.

C) On reaction with ${\mathrm{HgSO}}_4$ and dilute ${\mathrm{H}}_2{\mathrm{SO}}_4$ it forms propanal as major product.

The correct statements are

• (A) and (B) only

   

• (B) and (C) only

   

• (A) and (C) only

   

• (A), (B) and (C)

   

Q 9 :

Consider the following statements

A) Methane can be prepared by Kolbe’s electrolytic method

B) Ethane has infinite number of conformations

C) Magnitude of torsional strain in ethane depends upon the angle of rotation about C–C bond

D) n-Hexane undergoes isomerisation reaction in presence of anhyd. ${\mathrm{AlCl}}_3$ and HCl

The correct statements are

• (A), (B) and (C) only

   

• (A), (C) and (D) only

   

• (A), (B), (C) and (D)

   

• (B), (C) and (D) only

   

Q 10 :

Compound A and B respectively are :

• $o$ – bromo styrene, benzoic acid

   

• $p$ – bromo styrene, benzaldehyde

   

• $m$ – bromo styrene, benzaldehyde

   

• styrene dibromide, benzoic acid

   

Q 11 :

The product P obtained through the following sequence of reactions

According to IUPAC nomenclature, what position will be assign to chlorine atom from 1 to 6 in product P

Q 12 :

[IMAGE 189]

Compound (X) is subjected to the sequence of reactions as shown above. Molar mass of the major product (Y) formed is _______ g ${\mathrm{mol}}^{-1}$.

(Given molar mass in g ${\mathrm{mol}}^{-1}$ C : 12, H : 1, O : 16)                  [2026]

• 90

   

• 118

   

• 160

   

• 125

   

Q 13 :

"$P$" is a hydrocarbon of molecular formula: ${\mathrm{C}}_8{\mathrm{H}}_{14}$. On ozonolysis, "$P$" forms "$Q$". "$Q$" on treatment with alkali under reflux condition produces "$R$", which on treatment with ${\mathrm{I}}_2/\mathrm{NaOH}$ gives a yellow precipitate. Acidification of the solution gives "$S$". The structure of "$S$" is given below:

[IMAGE 191]

The correct structure of "$P$" is                   [2026]

• [IMAGE 192]

   

• [IMAGE 193]

   

• [IMAGE 194]

   

• [IMAGE 195]