Q.

(A) Half life period of first order reaction is independent of concentration of the reactant.
(R) 99.9 % reaction of first order reaction completes in 10 half lives.

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a

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

 

b

(A) is correct but (R) is wrong.

 

c

Both (A) and (R) are correct and (R) is the correct explanation of (A).

 

d

(A) and (R) both are wrong.

answer is B.

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Detailed Solution

  •  Half life period of first order reaction is independent of concentration of the reactant.

For 1st order reaction half life is independent of initial concentration.

t1/2​=0.693K

99.9 % reaction of first order reaction completes in 10 half lives.

 

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