NEET Chemistry Chemical Kinetics Questions Solved

NEET - 2009

In the reaction, BrO-3(aq) + 5Br-(aq) + 6H+ 3Br2(l) + 2H2O(l)

The rate of appearance of bromine (Br2) is related to rate of disappearance of bromide ions as following 

(a) d[Br2]/dt = (3/5)d[Br-]/dt

(b) d[Br2]/dt = (5/3)d[Br-]/dt

(c) d[Br2]/dt = (5/3)d[Br-]/dt

(d) d[Br2]/dt = (3/5)d[Br-]/dt

Key Idea: Rate of appearance/disappearance 

= +1/stoichiometric coefficient x [reactant or product ] / time taken 

For reacton, 

BrO-3(aq) + 5Br-(aq) + 6H+ 3Br2(l) + 3H2O(l)

Rate of appearance of bromine (Br2) = +1/3 d[Br2]/dt

Rate of diappearance of bromide ion (Br-) = -1/5d[Br-]/dt

or d[Br2]/dt = (-3/5)d[Br-]/dt

Difficulty Level:

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