1
JEE Main 2025 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List - I with List - II.

List - I (Structure) List - II (IUPAC Name)
(A) JEE Main 2025 (Online) 29th January Morning Shift Chemistry - Basics of Organic Chemistry Question 31 English 1 (I) 4-Methylpent-1-ene
(B) (CH3)2C(C3H7)2 (II) 3-Ethyl-5-methylheptane
(C) JEE Main 2025 (Online) 29th January Morning Shift Chemistry - Basics of Organic Chemistry Question 31 English 2 (III) 4,4-Dimethylheptane
(D) JEE Main 2025 (Online) 29th January Morning Shift Chemistry - Basics of Organic Chemistry Question 31 English 3 (IV) 2-Methyl-1,3-pentadiene

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

2
JEE Main 2025 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Total number of nucleophiles from the following is :

JEE Main 2025 (Online) 29th January Morning Shift Chemistry - Basics of Organic Chemistry Question 30 English

A

4

B

6

C

5

D

7

3
JEE Main 2025 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An element ‘E’ has the ionisation enthalpy value of 374 kJ mol⁻¹. ‘E’ reacts with elements A, B, C and D with electron gain enthalpy values of −328, −349, −325 and −295 kJ mol⁻¹, respectively. The correct order of the products EA, EB, EC and ED in terms of ionic character is :

A

EB > EA > EC > ED

B

EA > EB > EC > ED

C

ED > EC > EA > EB

D

ED > EC > EB > EA

4
JEE Main 2025 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : The radii of isoelectronic species increases in the order.

Mg2+ < Na+ < F$-$ < O2-

Statement (II) : The magnitude of electron gain enthalpy of halogen decreases in the order.

Cl > F > Br > I

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

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Statement I is correct but Statement II is incorrect

D

Both Statement I and Statement II are incorrect

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