Question

The rate constant of the reaction A - B is
0.6 x 10-3 mole per litre per second. If the
concentration of A is 5 M, then concentration of B
after 20 minutes is
[Re-AIPMT-2015)
(1) 0.36 M
(2) 0.72 M
(3) 1.08 M
(4) 3.60 M​

Answer 1

Answer:

For a zero -order reaction unit of the rate constant is mole per second. Hence, we can easily calculate concentration of B after 20 min by the following formula,

x = Kt

x = Kt = 0.6 x 10-3 x 20 x 60 = 0.72 M

Answer 2

Answer:

Answer is opposition (4) 3.60 M