1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Both reactions (i) and (ii) give the same compound X as the major product. Identify X

(i). 3-Methylbut-1-ene $+\mathrm{HCl} \rightarrow \mathrm{X}$

(ii). Neopentyl alcohol $+\mathrm{HCl}\left(\right.$ anh. $\left.\mathrm{ZnCl}_2\right) \rightarrow \mathrm{X}$

A
$\left(\mathrm{CH}_3\right)_2-\mathrm{CH}-\mathrm{CHCl}-\mathrm{CH}_3$
B
$\left(\mathrm{CH}_3\right)_2-\mathrm{CCl}-\mathrm{CH}_2-\mathrm{CH}_3$
C
$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)-\mathrm{CH}_2 \mathrm{Cl}$
D
$\left(\mathrm{CH}_3\right)_2-\mathrm{CH}-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Cl}$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Two chemical reactions of the same order have equal Frequency factor value. Their Activation energies differ by $26.8 \mathrm{~kJ} / \mathrm{mol}$. At 300 K if $k_2=x k_1$ find the value of $x$.
A
$4.631 \times 10^4$
B
$1.143 \times 10^3$
C
$2.286 \times 10^3$
D
4.665
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Arrange the following compounds in the decreasing order of the molar conductivities of their aqueous solutions.

A B C D
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_2$ $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$ $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$ $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$

A
$\mathrm{B}>\mathrm{C}>\mathrm{A}>\mathrm{D}$
B
$\mathrm{D}>\mathrm{A}>\mathrm{C}>\mathrm{B}$
C
$\mathrm{B}>\mathrm{A}>\mathrm{C}>\mathrm{D}$
D
$\mathrm{A}>\mathrm{B}>\mathrm{D}>\mathrm{C}$
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

From the given covalent compounds (A to F) identify the pair of molecules which have:

(i) Two lone pairs of electrons on the central atom.

(ii) One lone pair of electrons on the central atom.

A. $\mathrm{SO}_2$
B. $\mathrm{ClF}_3$
C. $\mathrm{BF}_3$
D. $\mathrm{BrF}_5$
E. XeF 4
F. $\mathrm{SF}_6$

A
(i) $A \& F\qquad$ (ii) $A \& E$
B
(i) $D \& F\qquad$ (ii) $\mathrm{C} \& \mathrm{D}$
C
(i) $B$ & $E\qquad$ (ii) $\mathrm{A} \& \mathrm{D}$
D
(i) $\mathrm{C} \& \mathrm{~A}\qquad$ (ii) $\mathrm{B} \& \mathrm{C}$
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