1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Among the following, which is not according to the property indicated against it?

A
$$ \mathrm{Mg}^{2+}<\mathrm{Na}^{+}<\mathrm{F}^{-}<\mathrm{O}^{2-} \text { [Increasing Ionic Size] } $$
B
$$ \mathrm{I}<\mathrm{Br}<\mathrm{F}<\mathrm{Cl} \text { [Increasing Elecrtron Gain Enthalpy with negative sign] } $$
C
$$ \mathrm{Na}<\mathrm{K}<\mathrm{Rb}<\mathrm{Cs} \text { [Increasing Metallic Radii] } $$
D
$$ \mathrm{B}<\mathrm{C}<\mathrm{N}<\mathrm{O} \text { [Increasing First Ionisation Enthalpy] } $$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The correct decreasing order of negative electron gain enthalpy for $$\mathrm{C}, \mathrm{Ca}, \mathrm{Al}, \mathrm{F}$$ and $$\mathrm{O}$$ is

A
$$\mathrm{F}>\mathrm{O}>\mathrm{C}>\mathrm{Al}>\mathrm{Ca}$$
B
$$\mathrm{Ca}>\mathrm{Al}>\mathrm{O}>\mathrm{F}>\mathrm{C}$$
C
$$\mathrm{Al}>\mathrm{F}>\mathrm{Ca}>\mathrm{C}>\mathrm{O}$$
D
$$\mathrm{F}>\mathrm{C}>\mathrm{O}>\mathrm{Ca}>\mathrm{Al}$$
3
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The group number of the element in the periodic table with the electronic configuration $$(\mathrm{n}-1) \mathrm{d}^2 \mathrm{~ns}^2$$. For $$n=4$$ is:

A
4
B
13
C
3
D
5
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The increasing order of atomic radii of the following group 13 elements is

A
Al < Ga < In < Tl
B
Ga < Al < In < Tl
C
Al < In < Tl < Ga
D
Al < Ga < Tl < In
COMEDK Subjects
EXAM MAP