The question appears to be incomplete as written. For a kinetics problem asking the concentration of $A$ at $10$ minutes, we need some additional information such as:

1. order of reaction, and/or
2. rate constant / half-life / decay law / graph data.

At present, only this is given:

• Initial concentration: $[A]_0 = 2.5\,\text{mol L}^{-1}$
• Time: $t = 10$ min
• Need $[A]$ in the form $\_\_\_\_ \times 10^{-3}\,\text{mol L}^{-1}$

But from kinetics, concentration at time $t$ depends on the rate law:

• Zero order: $[A]_t = [A]_0 - kt$
• First order: $[A]_t = [A]_0 e^{-kt}$
• Second order: $\frac{1}{[A]_t} = \frac{1}{[A]_0} + kt$

Without $k$ or equivalent data, the concentration cannot be uniquely determined.

Comparison with stored answer

The stored correct answer is 2435, which would imply $[A]_{10\,\text{min}} = 2435 \times 10^{-3} = 2.435\,\text{mol L}^{-1}$ This corresponds to only a very small decrease from the initial concentration $2.5\,\text{mol L}^{-1}$, but there is no way to derive this uniquely from the provided statement alone.

So, based on the information visible in the question, I do not agree with the stored answer because the question data is insufficient.

If some missing data (for example half-life, first-order rate constant, or decay percentage) was omitted, then the answer might possibly become $2435$.