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1
MHT CET 2025 25th April Evening Shift
MCQ (Single Correct Answer)
+1
-0
If Instantaneous rate of reaction is stated as $-\frac{1}{2} \frac{\mathrm{~d}[x]}{\mathrm{dt}}=-\frac{\mathrm{d}[\mathrm{y}]}{\mathrm{dt}}=\frac{1}{2} \frac{\mathrm{~d}[\mathrm{z}]}{\mathrm{dt}}$, identify the reaction.
A
$x-2 y \longrightarrow 2 z$
B
$2 x+y \longrightarrow 2 z$
C
$x+y \longrightarrow z$
D
$\quad 2 x-2 y \longrightarrow z$
2
MHT CET 2025 25th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is an example of second order reaction?

A

$2 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_2 \mathrm{P}_{(\ell)}+\mathrm{O}_{2(\mathrm{~g})}$

B

$\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{HI}_{(\mathrm{g})}$

C

$\mathrm{CH}_3 \mathrm{CHO}_{(\mathrm{g})} \longrightarrow \mathrm{CH}_{4(\mathrm{~g})}+\mathrm{CO}_{(\mathrm{g})}$

D

$2 \mathrm{NO}_{(\mathrm{g})}+2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{N}_{2(\mathrm{~g})}+2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})}$

3
MHT CET 2025 25th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the time required for $99 \%$ completion of a first order reaction if rate constant is $23.03 \mathrm{~min}^{-1}$ ?

A
0.2 minute
B
0.4 minute
C
6.2 minute
D
8.1 minute
4
MHT CET 2025 25th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

For a reaction $\mathrm{A} \rightarrow$ Product, rate constant is $6.93 \times 10^{-3}$ hour ${ }^{-1}$. What is order of reaction?

A
Zero
B
1
C
1.5
D
2
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