1
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a first order reaction $60 \%$ of the reactant converts into product in 45 minute. Calculate rate constant of the reaction.

A
0.0102 minute $^{-1}$
B
0.0204 minute$^{-1}$
C
0.0306 minute $^{-1}$
D
0.0408 minute ${ }^{-1}$
2
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
 

For the reaction,

$$\mathrm{CH}_3 \mathrm{Br}_{(\mathrm{aq})}+\mathrm{OH}_{(\mathrm{aq})}^{-} \longrightarrow \mathrm{CH}_3 \mathrm{OH}_{(\mathrm{aq})}+\mathrm{Br}_{(\mathrm{aq})}^{-}$$

rate of consumption of $\mathrm{OH}_{(\mathrm{aq})}^{-}$is $\mathrm{x} \mathrm{mol} \mathrm{dm}{ }^{-3} \mathrm{~s}^{-1}$ What is the rate of formation of $\mathrm{Br}_{(9 q)}^{-}$?

A
$0.5 \mathrm{x} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$
B
$\mathrm{x} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$
C
$2x \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$
D
$\frac{3}{2}x\mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$
3
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction,

$$\mathrm{H}_{2(g)}+\mathrm{Br}_{2(8)} \longrightarrow 2 \mathrm{HBr}_{(\mathrm{g})}, \mathrm{r}=\mathrm{k}\left[\mathrm{H}_2\right]\left[\mathrm{Br}_2\right]^{\frac{1}{2}}$$

What is the molecularity and order of reaction respectively?

A
Monomolecular and $\frac{1}{2}$
B
Monomolecular and 1
C
Monomolecular and $\frac{3}{2}$
D
Bimolecular and $\frac{3}{2}$
4
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is true for a reaction as per coliision theory?

A
Every collision between reactants leads to chemical reaction.
B
It may be expected that rate of reaction is equal to rate of collision.
C
For gas phase reactions, the number of collisions is far less compared to observed rate.
D
The colliding molecules do not need proper orientation.
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