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1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0
What are the Principal & Azimuthal quantum number values of the valence electrons in tripositive Lutetium?

A
$$ \mathrm{n}=4 \quad \& \quad 1=2 $$
B
$$ \mathrm{n}=5 \quad \& \quad 1=2 $$
C
$$ \mathrm{n}=5 \quad \& \quad 1=3 $$
D
$$ n=4 \quad \& \quad 1=3 $$
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The correct sequence of filling of electrons in $$n=6$$ is:

A
$$ n s \rightarrow(n-1) d \rightarrow(n-2) f \rightarrow n p $$
B
$$ n s \rightarrow n p \rightarrow(n-1) d \rightarrow(n-2) f $$
C
$$ n s \rightarrow(n-2) f \rightarrow n p \rightarrow(n-1) d $$
D
$$ n s \rightarrow(n-2) f \rightarrow(n-1) d \rightarrow n p $$
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the first three radii of Bohr's atom is:

A
$$1: 4: 9$$
B
$$1: 5: 9$$
C
$$1:4:27$$
D
$$1: 2: 3$$
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following options.

Assertion : Energy of $$2 \mathrm{~s}$$ orbital of Hydrogen is less than the energy of the $$2 \mathrm{~s}$$ orbital of Lithium.

Reason : Energies of orbitals in the same subshell decrease with increase in atomic number.

A
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B
Assertion is correct but Reason is incorrect statement.
C
Assertion is incorrect but Reason is correct statement.
D
Both Assertion and Reason are incorrect statements.
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