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In a reaction,2xy, the concentration of x decreases from 3.0 M to 1.5 M in 4 min. The rate of the reaction is 

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a
0.187 M min−1
b
1.87 M min-1
c
3.75×10−1M min−1
d
0.75 M min−1

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detailed solution

Correct option is A

Rate of reaction=−12d[x]dt                         =−12[1.5−3.0]4=1.58=0.1875Mmin−1

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