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1
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A first order reaction is $25 \%$ completed in 40 minutes. What is the rate constant $k$ for the reaction?

A
$\frac{2.303 \times \log 1.33}{40}$
B
$2.303 \times \log {\frac{4}{3}}$
C
$\frac{2.303 \times \log 4}{40 \times 3}$
D
$\frac{2.303}{40} \times \log \frac{1}{4}$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A first order reaction has a rate constant 0.00813 min$$^{-1}$$. How long will it take for 60% completion?

A
56.35 min
B
98.7 min
C
62.77 min
D
112.7 min
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the value of rate constant of first order reaction, if it takes 15 minutes for consumption of $$20 \%$$ of reactants?

A
$$1.38 \times 10^{-2} \mathrm{~min}^{-1}$$
B
$$1.48 \times 10^{-2} \mathrm{~min}^{-1}$$
C
$$1.07 \times 10^{-2} \mathrm{~min}^{-1}$$
D
$$1.84 \times 10^{-2} \mathrm{~min}^{-1}$$
4
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

If concentration of reactant '$$A$$' is increased by 10 times the rate of reaction becomes 100 times. What is the order of reaction, if rate law is, rate $$=k[A]^x$$ ?

A
3
B
2
C
4
D
1
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