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Reaction rates are approximately exponential in temperature, but there is nothing special about 10C. The doubling temperature difference depends on what reaction you look at.

This is as opposed to decibel for sound, where +10 decibel means X10 power exactly.

To be clear, that's true of power decibels for everything, not just sound.

The Celsius scale is an "interval scale" while the Kelvin scale is a "ratio scale". One cannot take ratios of Celsius temperature values as ratios are not even defined for that. It’s possible for differences of temperatures on the Celsius scale, though.

https://en.wikipedia.org/wiki/Level_of_measurement

>For every increase of 10C chemical reactions happen twice as fast

Except for the ones that go at different rates.