1
JEE Main 2025 (Online) 28th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The incorrect decreasing order of atomic radii is

A
$\mathrm{Si}>\mathrm{P}>\mathrm{Cl}>\mathrm{F}$
B
$\mathrm{Mg}>\mathrm{Al}>\mathrm{C}>\mathrm{O}$
C
$\mathrm{Al}>\mathrm{B}>\mathrm{N}>\mathrm{F}$
D
$\mathrm{Be}>\mathrm{Mg}>\mathrm{Al}>\mathrm{Si}$
2
JEE Main 2025 (Online) 28th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the following elements $\mathrm{In}, \mathrm{Tl}, \mathrm{Al}, \mathrm{Pb}, \mathrm{Sn}$ and Ge . The most stable oxidation states of elements with highest and lowest first ionisation enthalpies, respectively, are

A
+4 and +1
B
+4 and +3
C
+1 and +4
D
+2 and +3
3
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The successive 5 ionisation energies of an element are $800,2427,3658,25024$ and $32824 \mathrm{~kJ} / \mathrm{mol}$, respectively. By using the above values predict the group in which the above element is present :

A
Group 4
B
Group 2
C
Group 13
D
Group 14
4
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : The first ionization energy of Pb is greater than that of Sn .

Statement (II) : The first ionization energy of Ge is greater than that of Si .

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

A
Statement I is false but Statement II is true
B
Both Statement I and Statement II are false
C
Both Statement I and Statement II are true
D
Statement I is true but Statement II is false
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