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

The rate constant for the reaction $$\mathrm{A} \rightarrow \mathrm{B}+\mathrm{C}$$ at $$500 \mathrm{~K}$$ is given as $$0.004 \mathrm{~s}^{-1}$$. At what temperature will the rate constant become $$0.014 \mathrm{~s}^{-1}$$ ? $$\mathrm{E}_{\mathrm{a}}$$ for the reaction is $$18.231 \mathrm{~kJ}$$.

A
950 K
B
597 K
C
700 K
D
800 K
2
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

An organic compound $$[\mathrm{A}]\left(\mathrm{C}_5 \mathrm{H}_{12} \mathrm{O}\right)$$, on reaction with conc. $$\mathrm{H}_2 \mathrm{SO}_4$$ at $$443 \mathrm{~K}$$ gives $$[\mathrm{B}]$$ as one of the products. Compound [B] undergoes further reaction with $$\mathrm{O}_3$$ and $$\mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$$ to give Propanone and Ethanal as products. Identify compound [A]

A
Pentan-2-ol
B
Pentan-1-ol
C
3-Methylbutan-2-ol
D
2- Methylbutan-1-ol
3
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction $$\mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{NO}_{(\mathrm{g})} \rightarrow 2 \mathrm{NOCl}_{(\mathrm{g})}$$, the following data was obtained:

Experiment No. Initial concentration of $$\mathrm{Cl_2}$$ ($$\mathrm{M}$$) Initial concentration of $$\mathrm{NO}$$ ($$\mathrm{M}$$) Initial reaction rate ($$\mathrm{M}$$/min)
I 0.15 0.15 0.60
II 0.30 0.15 1.20
III 0.15 0.3 2.40
IV 0.25 0.25 2.78

Identify the order of the reaction with respect to $$\mathrm{Cl}_2, \mathrm{NO}$$ and the value of Rate constant.

A
$$ \text { Order with respect to } \mathrm{Cl}_2=2 \quad \text { Order with respect to } \mathrm{NO}=1 \quad \mathrm{k}=355.5 \mathrm{~mol}^{-2} \mathrm{~L}^2 \mathrm{~min}^{-1} $$
B
$$ \text { Order with respect to } \mathrm{Cl}_2=0 \quad \text { Order with respect to } \mathrm{NO}=1 \quad \mathrm{k}=8.0 \mathrm{~min}^{-1} $$
C
$$ \text { Order with respect to } \mathrm{Cl}_2=1 \quad \text { Order with respect to } \mathrm{NO}=2 \quad \mathrm{k}=177.7 \mathrm{~mol}^{-2} \mathrm{~L}^2 \mathrm{~min}^{-1} $$
D
$$ \text { Order with respect to } \mathrm{Cl}_2=1 \quad \text { Order with respect to } \mathrm{NO}=1 \quad \mathrm{k}=26.66 \mathrm{~mol}^{-1} \mathrm{Lmin}^{-1} $$
4
COMEDK 2024 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$\mathrm{K}_{\mathrm{H}}$$ for $$\mathrm{O}_2$$ at $$293 \mathrm{~K}$$ is $$34.86 \mathrm{~kbar}$$. What should be the partial pressure of $$\mathrm{O}_2$$ gas so that it has a solubility of $$0.08 \mathrm{~g} / \mathrm{L}$$ in water at $$293 \mathrm{~K}$$ ? (Density of solution $$=1 \mathrm{~g} / \mathrm{ml}$$)

A
156.8 $$\times$$ 10$$^{-5}$$ bar
B
15680 bar
C
156.8 bar
D
1.569 bar
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