1
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct trend in the first ionization enthalpies of the elements in the $3^{\text {rd }}$ period of periodic table is :

A

$\mathrm{Si}<\mathrm{S}<\mathrm{Al}<\mathrm{P}<\mathrm{Cl}$

B

$\mathrm{Al}<\mathrm{Si}<\mathrm{S}<\mathrm{P}<\mathrm{Cl}$

C

$\mathrm{S}<\mathrm{Si}<\mathrm{Al}<\mathrm{P}<\mathrm{Cl}$

D

$\mathrm{Al}<\mathrm{S}<\mathrm{P}<\mathrm{Si}<\mathrm{Cl}$

2
JEE Main 2026 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : $\mathrm{C}<\mathrm{O}<\mathrm{N}<\mathrm{F}$ is the correct order in terms of first ionization enthalpy values.

Statement II : $\mathrm{S}>\mathrm{Se}>\mathrm{Te}>\mathrm{Po}>\mathrm{O}$ is the correct order in terms of the magnitude of electron gain enthalpy values.

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

A

Both Statement I and Statement II are false

B

Statement I is false but Statement II is true

C

Statement I is true but Statement II is false

D

Both Statement I and Statement II are true

3
JEE Main 2026 (Online) 21st January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : The correct order in terms of atomic/ionic radii is Al > Mg > Mg2+ > Al3+.

Statement II : The correct order in terms of the magnitude of electron gain enthalpy is Cl > Br > S > O.

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

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are true

C

Statement I is false but Statement II is true

D

Both Statement I and Statement II are false

4
JEE Main 2026 (Online) 21st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following represents the correct trend for the mentioned property?

A. F > P > S > B      - First Ionization Energy

B. Cl > F > S > P      - Electron Affinity

C. K > Al > Mg > B      - Metallic character

D. K2O > Na2O > MgO > Al2O3      - Basic character

Choose the correct answer from the options given below :

A

B and C only

B

A, B and D only

C

A and B only

D

A, B, C and D

JEE Main Subjects

Browse all chapters by subject