Chemical Kineti...

The half life of a radioactive isotope is $$3$$ hours. What is the value of its disintegration constant?

Two radioactive isotopes P and Q have half-lives of 10 minutes and 15 minutes, respectively. Freshly prepared samples of each isotope initially contain the same number of atoms as one another, After 30 minutes, the ratio of $$\displaystyle \frac{{the\  number\  of\  atoms\  of\  P}}{{the\  number\  of\  atoms\  of\  Q}}$$ will be:

For an endothermic reaction, energy of activation is E$$_{a}$$ and enthalpy of reaction is H (both of these in kJ/mol). Minimum value of E$$_{a}$$ will be:

For a first-order reaction; A $$\rightarrow $$ B, the reaction rate at a reactant concentration of 0.01 M is found to be $$2.0 \times 10^{-5}$$ mole L$$^{-1}$$s$$^{-1}$$. The half-life period of the reaction is:

In a first-order reaction $$A\rightarrow B$$, if k is rate constant and initial concentration of the reactant A is 0.5 M then the half-life is:

Statement 1:
In a zero order reaction, if the concentration of the reactant is doubled, the half-life period is also doubled.
Statement 2:
For a zero-order reaction, the rate of the reaction is independent of initial concentration.

What is the hybridisation in $$AsF_4^-$$ ion :

Decomposition of $$H_2O$$ is a first order reaction. A 16 volume solution of $$H_2O_2$$ of half-life period 30 minutes is present at the start. When will the solution become one volume?

The activation energy of the forward reaction and backward reaction decreases by $$30 kcal$$ then which of the following statement is correct?