NEET Chemistry Chemical Kinetics Questions Solved


A drop of solution (volume 0.05 mL) contains 3.0 x10-6 mole of H+. If the rate constant of disappearance of H+ is 1.0x10-7 mol litre sec?. How long would it take for H+ in drop to disappear?

(a) 6x10-8 sec

(b)6x10-7 sec

(c)6x10-9 sec

(d)6x10-10 sec

(c) 6x10-9 sec

Since rate constant = 1.0x10-7 mol litre sec 

Zero order reaction.

For zero order t = x/K = concentration used/rate constant                    ....(i)

0.05ml has 3x10-6x103/0.05 = 0.06x10-1 mol/litre of H+ 

By Eq. (i),  t = 0.6x10-1/1x107 = 6x10-9 second  

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