A first-order reaction is 50 % completed in 30 minutes at 27° C. Its rate constant is

Question

A first-order reaction is 50 % completed in 30 minutes at 27° C. Its rate constant is (A) 2.31 × 10-2 min -1 (B) 3.21 × 10-2 min -1 (C) 4.75 × 10-2 min 1 (D) 1.33 × 10-3 min -1

Tardigrade Admin · Accepted Answer

Correct answer is (a) 2.31 × 10-2 min -1

Q. A first-order reaction is $50%$ completed in $30$ minutes at $2 7^{\circ} C$ . Its rate constant is

$2.31 \times 1 0^{- 2} min^{- 1}$

$3.21 \times 1 0^{- 2} min^{- 1}$

$4.75 \times 1 0^{- 2} min^{1}$

$1.33 \times 1 0^{- 3} min^{- 1}$

Correct answer is (a) $2.31 \times 1 0^{- 2} min^{- 1}$

Q. A first-order reaction is 50% completed in 30 minutes at 27∘C. Its rate constant is

2.31×10−2min−1

3.21×10−2min−1

4.75×10−2min1

1.33×10−3min−1