Slope of the rate against concentration graph for a first order reaction (equals k)

1. A.
   $-k$
2. B.
   $k$
3. C.
   $\frac{k}{2.303}$
4. D.
   $\frac{-k}{2.303}$

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1. A.
   $2.5 \times 10^{-3}\,\text{time}^{-1}$
2. B.
   $5.0 \times 10^{-3}\,\text{time}^{-1}$
3. C.
   $7.5 \times 10^{-3}\,\text{time}^{-1}$
4. D.
   $1.25 \times 10^{-3}\,\text{time}^{-1}$

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