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

What is the wave number (Units $$\mathrm{cm}^{-1}$$) of the longest wave length transition in the Balmer series of Hydrogen spectrum? $$Z=1 \text { for } H$$

A
27419.6
B
15233
C
39605.6
D
1354
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Given below are 2 statements: Assertion and Reason. Choose the correct option.

Assertion: When Molar conductivity for a strong electrolyte is plotted versus $$\sqrt{C}(\mathrm{~mol} / \mathrm{L})^{1 / 2}$$, a straight line is obtained with intercept equal to Molar conductivity at infinite dilution for the electrolyte and Slope equal to $$-\mathrm{A}$$. All electrolytes of a given type have the same $$\mathrm{A}$$ value.

Reason: At infinite dilution, strong electrolytes of the same type will have different number of ions due to incomplete dissociation.

A
Assertion is correct but Reason is incorrect statement.
B
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
C
Both Assertion and Reason are incorrect statements.
D
Assertion is incorrect but Reason is correct statement.
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Based on Valence Bond Theory, match the complexes listed in Column I with the number of unpaired electrons on the central metal ion, given in Column II

No. Complex ions No. Number of unpaired electrons
(A) $$
\left[\mathrm{Fe} \mathrm{F}_6\right]^{3-}
$$
(P) 0
(B) $$
\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}
$$
(P) 1
(C) $$
\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}
$$
(R) 5
(D) $$
\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}
$$
(S) 4

A
$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{Q} \quad \mathrm{C}=\mathrm{R} \quad \mathrm{D}=\mathrm{P} $$
B
$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{Q} \quad \mathrm{C}=\mathrm{P} \quad \mathrm{D}=\mathrm{R} $$
C
$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{S} \quad \mathrm{D}=\mathrm{Q} $$
D
$$ \mathrm{A}=\mathrm{R} \quad \mathrm{B}=\mathrm{S} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P} $$
4
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
$$ n=4 \quad \& \quad 1=3 $$
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