CUET PG PYQs for Hydrocarbons with Solutions: Practice CUET PG Previous Year Questions

1.

Identify the major product in the following reaction

• \(2-(\alpha-Furyl)-arcylic \;acid\)
• \(3-(\alpha-Furyl)-arcylic \;acid\)
• \(2-(\beta-Furyl)-arcylic \;acid\)
• \(3-(\beta-Furyl)-arcylic \;acid\)

2.

Choose the correct product formed in the following reaction

3.

Match List I with List II:
     List I (Reaction)                                                                List II (Mettalo enzyme)
(A) \(R-H+O_2+2H^++2e^-R-OH+H_2O\)         (I) Cytochrome P-450
(B) \(2H_2O_2\rightarrow 2H_2O+O_2\)                                                 (II) Catalase
(C) e-transfer protein                                                           (III) Ferredoxin
(D) \(O_2+4H^++4e^- \rightarrow2H_2O\)                                     (IV)   Cytochrome (oxidase)
Choose the correct answer from the options given below:

• (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• (A)-(IV), (B)-(III). (С)-(II), (D)-(I)
• (A)-(I). (B)-(III), (C)-(II). (D)-(IV)
• (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

4.

Identify the major product in the following reaction

• \((p-CH_3)C_6H_4CH_2COOH\)
• \((p-CH_3)C_6H_4CH_2COEt\)
• \((p-CH_3)C_6H_4COOH\)
• \((p-CH_3)C_6H_4CH=C(NO_2)(CO_2Et)\)

5.

Match List I with List II

List I		List II
A.	Carbonyl compounds react with ylide to form alkene.	I.	Cannizzaro Reaction
B.	Ketone reacts with zinc-mercury amalgam in HCl as reducing agent to form alkane.	II.	Clemmensen Reduction
C.	Carbonyl compounds react with basic solution of hydrazine as reducing agent to produce alkane.	III.	Wittig Reaction
D.	Formaldehyde react with NaOH to form methanol.	IV.	Wolf-Kishner Reduction

Choose the correct answer from the options given below:

• A-IV, B-III, C-II, D-I
• A-IV, B-II, C-I, D-III
• A-III, B-II, C-IV, D-I
• A-I, B-II, C-III, D-IV

6.

Which of the following compound represent the correct structure of (2R, 3S)-2,3-pentanediol?

7.

Identify the major product in the following reaction.

• 
• 
• C₂H₆
• CH₄

8.

The structure of a carborane, \(C_2B_5H_7\), is

• Seven vertex polyhedron, nido structure
• Six vertex polyhedron, closo structure
• Six vertex polyhedron, nido structure
• Seven vertex polyhedron, closo structure

9.

The following reaction undergoes via _________ and is known as ______ reaction.

• Carbene, Reimer-Tiemann
• Carbocation, Kolbe
• Carbene, Kolbe
• Carbocation, Reimer-Tiemann

10.

The relative order of stability of conformers of 1,3-dimethylcyclohexane is (equatorial - e, axial-a)

• \(e,e>e, a=a, e>a, a\)
• \(a, a>e, a=a, e>e, e\)
• \(e,e>a, a>e,a=a,e\)
• \(e,a =a,e>a, a>e, e\)

11.

The bond enthalpies for C-H, C1-C1, C-C1 and H-Cl are 99, 58, 78 and 103 kcal/mol respectively. What will be the AH for the reaction
CH_4(g) + Cl_2(g) → CH₃Cl_(g) + HCl_(g)

• -24 kcal
• 26 kcal
• -23 kcal
• -32 kcal

12.

Phenylbenzoate can be prepared from phenol using which of the following name reaction?

• Schotten Baumann reaction
• Fries Rearrangement
• Claisen Rearrangement
• Hauben-Hoesch reaction

13.

Deduce the structure of the product in the following reaction

14.

Arachno and nido structure of Boranes have general formula respectively

• \([B_nH_n]^{2-}\;and \;B_n\;H_{2n+2}\)
• \([B_nH_{n+2}]\;and \;[B_n\;H_n]^{2-}\)
• \([B_nH_{n+6}]\;and \;[B_n\;H_{n+4}]\)
• \([B_nH_{n+4}]\;and \;[B_n\;H_{n+6}]\)

15.

Identify the major product in the following reaction.