Question

Which among the following is true regarding a first order reaction A B  where k is the rate constant and t the time taken for the reaction?
1) The degree of dissociation of A is equal
to (1 + e–kt)
2) The plot of reciprocal concentration of
the reactant Vs time gives a straight line
3) The time taken for completion of 75%
of a reaction is thrice the t1/2 of the reaction
4) The pre exponential factor for Arrhenius
equation has the dimension of time–1

Answer 1

Explanation:

As we know that the general eq (mol/litre)¹⁻ⁿ s⁻¹

when  n = 1

The unit will be sec ⁻¹

Answer 2

Answer:option 4

Explanation: