1
MHT CET 2021 21th September Morning Shift
+1
-0

In a first order reaction, concentration of reactant is reduced to (1/8)th of concentration in 23.03 minutes. What is half-life period of reaction?

A
25 min
B
7.7 min
C
15 min
D
30 min
2
MHT CET 2021 20th September Evening Shift
+1
-0

For the reaction $$2 \mathrm{NO}+\mathrm{Cl}_2 \rightarrow 2 \mathrm{NOCl}$$

What is the relation between $$\frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}}$$ and $$\frac{\mathrm{d}[\mathrm{NOCl}]}{\mathrm{dt}}$$ ?

A
$$\frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}}=2 \frac{\mathrm{d}[\mathrm{NOCl}]}{\mathrm{dt}}$$
B
$$\frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}}=\frac{\mathrm{d}[\mathrm{NOCl}]}{\mathrm{dt}}$$
C
$$\frac{1}{4} \frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}}=\frac{\mathrm{d}[\mathrm{NOCl}]}{\mathrm{dt}}$$
D
$$4 \frac{\mathrm{d}[\mathrm{NO}]}{\mathrm{dt}}=\frac{\mathrm{d}[\mathrm{NOCl}]}{\mathrm{dt}}$$
3
MHT CET 2021 20th September Evening Shift
+1
-0

In a first order reaction concentration of reactant decreases from 20 m mol to 10 m mol in 1.151 min. What is rate constant?

A
1.15 min$$^{-1}$$
B
3.0 min$$^{-1}$$
C
5.50 min$$^{-1}$$
D
0.60 min$$^{-1}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

Which type of reaction order is followed by radioactive processes?

A
0
B
1
C
2
D
1.5
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Mechanics
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Electromagnetism
Modern Physics
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Inorganic Chemistry
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