# The effectiveness factor for large value of Thiele modulus [L√(K/D1 )] of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm2 /second). (A) L √(K/D1 ) (B) 1/[L√(K/D1 )] (C) 1 (D) ∞

The effectiveness factor for large value of Thiele modulus [L√(K/D1
)] of
a solid catalysed first order reaction is equal to (where, L = length of the
reactor, cm, D1 = diffusion co-efficient, cm2
/second).
(A) L √(K/D1
)
(B) 1/[L√(K/D1
)]
(C) 1
(D) ∞

(B) 1/[L√(K/D1
)]

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