Assertion: In gaseous reaction, when the concentration of gases is expressed in terms of their partial pressures, then unit of rate will be atm s^-1.

Reason: Units of rate are concentration time^-1.

Assertion and Reason both are correct statements and reason is the correct explanation for assertion.

Units of rate are concentration time^-1.

If concentration is in mole L-1 and time is in second, then the unit of rate will be mole L^-1 s^-1.

In gaseous reaction, when the concentration of gases is expressed in terms of their partial pressures, then unit of rate will be atm s^-1.