Largest Value of Non-Negative Integer $a$

The largest value of the nonnegative integer a for which

is

JEE Advanced 2013 Physics Electrostatics Solution

More than one option may be correct.

Order of Reaction $P + Q \to R + S$

Problem

In the reaction,

$\displaystyle P+Q\to R+S$

the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varies with reaction time as shown in the figure. The overall order of the reaction is

(A) 2                                                         (B) 3
(C) 0                                                         (D) 1
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