1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

If rate of reaction is given as

$$\frac{1}{3} \frac{\mathrm{d}[\mathrm{x}]}{\mathrm{dt}}=-\frac{1}{2} \frac{\mathrm{d}[\mathrm{y}]}{\mathrm{dt}}=-\frac{\mathrm{d}[\mathrm{Z}]}{\mathrm{dt}}$$,

the reaction can be represented as

A
$$2 \mathrm{y}+Z \rightarrow 3 \mathrm{x}$$
B
$$2 \mathrm{y} \rightarrow 3 \mathrm{x}+\mathrm{Z}$$
C
$$3 x+2 y \rightarrow Z$$
D
$$3 x \rightarrow 2 y+Z$$
2
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a first reaction 60% of reactant decomposes in 4.606 min. What is half life of reaction? (k = 0.1989 min$$^{-1}$$)

A
3.48 min
B
2.4 min
C
3.0 min
D
1.74 min
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction, $$2 \mathrm{~A}+\mathrm{B} \rightarrow 2 \mathrm{C}$$, rate of disappearance of $$\mathrm{A}$$ is $$0.076 \mathrm{~mol} \mathrm{~s}^{-1}$$. What is the rate of disappearance of $$\mathrm{B}$$ ?

A
$$0.076 \mathrm{~mol} \mathrm{~s}^{-1}$$
B
$$0.038 \mathrm{~mol} \mathrm{~s}^{-1}$$
C
$$0.019 \mathrm{~mol} \mathrm{~s}^{-1}$$
D
$$0.095 \mathrm{~mol} \mathrm{~s}^{-1}$$
4
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Half-life and rate constant for first order reaction are related by equation,

A
$$ t_{1 / 2}=\frac{k}{0.693} $$
B
$$ k=\frac{[A]_0-[A]_1}{t_{1 / 2}} $$
C
$$ t_{1 / 2}=\frac{0.693}{k} $$
D
$$ t_{1 / 2}=\frac{[\mathrm{A}]_1-[\mathrm{A}]_0}{k} $$
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