NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

1 Hard

1 of 1

Application +4 | -1

Two substances A and B are present such that

\left[ A \right] = 4\left[ B \right]

and half-life of

A

is 5 minute and of

B

is 15 minute. If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?

View answer and explanation

Correct option: A

15 minute

Option A (15 minute) is correct because it is the time when the concentrations of A and B will be the same, calculated using the first-order decay equations.

More Questions from CHEMICAL KINETICS

Practice All Chapter MCQs →

If the reaction rate at a given temperature becomes slower then

\frac{1}{{{{\left[ A \right]}^2}}}

vs times are a straight line. Order of reaction is The rate constant

\left( {k'} \right)

of one of the reaction is found to be double that of the rate constant

\left( {k''} \right)

of another reaction. Then the relationship between the corresponding activation energies of the two reaction

\left( {{{E'}_a}\;\mathrm{and}\;{{E''}_a}} \right)

can be represented as Acid hydrolysis of sucrose is a Order of radioactive disintegration reaction is Temperature coefficient of a reaction is 2. When temperature is increased from

30^\circ C\;to\;100^\circ C

, rate of the reaction increases by