Statement (A) : Units of rate of reaction may be expressed as $mol L^{- 1} S^{- 1}$
Statement (B) : In the case of gaseous reaction, rate will have the unit of atm $\sec^{- 1}$
Statement (C) : Instantaneous rate is more accurate and may also be defined as equal to average rate when $∆ t \to 0$

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A, B are correct but C is incorrect

All statements A, B, C are correct

A, B are incorrect but C is correct

All statements A, B, C are incorrect

answer is A.

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Detailed Solution

Units of rate of reaction

= \frac{[Concentration]}{[Time]} = \frac{mole/L}{Time} = mol . L^{- 1} S^{- 1}

Units of gaseous reaction $= (Pressure) . {Sec}^{- 1} = atm . \sec^{- 1}$

Instantaneous rate is more accurate and may also be defined as equal to average rate when $Δ t \to 0$ .

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