1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Solubility product of the sparingly soluble salt $\mathrm{AgBrO}_3$ in aqueous medium is $9.3 \times 10^{-10}$ Calculate the mass in gram of $\mathrm{AgBrO}_3$ present in 100 ml of its saturated solution. (Molar mass of $\mathrm{AgBrO}_3$ is $236 \mathrm{~g} / \mathrm{mol}$ )
A
$3.0495 \times 10^{-4}$
B
$4.962 \times 10^{-4}$
C
$6.248 \times 10^{-5}$
D
$7.198 \times 10^{-4}$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
What is the reduction potential of a half-cell consisting of a Pt electrode dipped in $2.2 \mathrm{M} \mathrm{Fe}^{2+}$ and $0.04 \mathrm{M} \mathrm{Fe}^{3+}$ solution where the reaction taking place is conversion of $\mathrm{Fe}^{3+}$ ions to $\mathrm{Fe}^{2+}$ ?

$$\mathrm{E}^0\left(\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}\right)=0.771 \mathrm{~V}$$

A
0.598 V
B
0.723 V
C
0.668 V
D
0.719 V
3
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
$\left(\mathrm{CH}_3\right)_2-\mathrm{CH}-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Cl}$
4
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
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