For a reaction `A + B rarr C`, the rate of the reaction is denoted `(-dA)/(dt)` or `(-dB)/(dt)` or `(+dC)/(dt)`. State the significance of plus and minus sign.

Explanation

Minus sign i.e. `(-dA)/(dt)` or `(-dB)/(dt)` indicates decreases in the concentration of reactants whereas + sign indicrease in the concentration of products with time i.e. `(+dC)/(dt)`.