Zero-Order Reaction Quiz

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Zero-order basics & graphs

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zubia nadeem

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Zero-Order Reaction Quiz


Zero-Order Reaction QuizVersion en ligne Zero-order basics & graphs par zubia nadeem 1 In a zero-order reaction, the rate law is expressed as: a rate = k b rate ∝ [A] c rate ∝ 1/[A] d rate ∝ [A]^2 2 Which plot is linear for a zero-order reaction? a t vs rate b 1/[A] vs t c [A] vs t d ln[A] vs t 3 What is the half-life t1/2 for a zero-order reaction? a t1/2 = [A]0/k b t1/2 = 2[A]0/k c t1/2 = [A]0/(2k) d t1/2 = k/[A]0 4 As [A] decreases in a zero-order reaction, the rate: a becomes infinite b increases c remains constant d decreases 5 If [A]0 = 0.80 M and k = 0.20 M s^-1, t1/2 = ? a 4.0 s b 1.0 s c 2.0 s d 0.8 s 6 Units of k for a zero-order reaction are: a s^-1 b s^-2 c M s^-1 d M 7 Zero-order reactions often occur when: a temperature dominates b the solvent is nonpolar c the reaction is surface-catalyzed with saturated sites d the reactant is in excess 8 Which equation derives from d[A]/dt = -k for zero-order? a d[A]/dt = -k ⇒ [A] = [A]0 − kt b ln[A] = -kt c d[A]/dt = -k[A] d d[A]/dt = -k[A]^2 9 Graph of rate vs [A] for zero-order is: a a horizontal line b a straight line with negative slope c a straight line with positive slope d a curved line 10 How does t1/2 in zero-order change with decreasing [A]0? a t1/2 decreases b t1/2 stays same c t1/2 increases d t1/2 becomes infinite Feedback 1 Correct: rate is constant, independent of [A]. 2 Correct: [A] = [A]0 − kt gives a straight line. 3 Correct: t1/2 depends on initial concentration and k. 4 Correct: rate = k is independent of [A]. 5 Correct: t1/2 = 0.80/(2×0.20) = 2.0 s. 6 Correct: rate = k has units of concentration per time. 7 Correct: saturation leads to constant rate. 8 Correct: straightforward integration gives [A] = [A]0 − kt. 9 Correct: rate = k is constant, independent of [A]. 10 Correct: t1/2 = [A]0/(2k); smaller [A]0 gives smaller t1/2.

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Zero-Order Reaction Quiz

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Créé par

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Zero-Order Reaction QuizVersion en ligne

par zubia nadeem

In a zero-order reaction, the rate law is expressed as:

Which plot is linear for a zero-order reaction?

What is the half-life t1/2 for a zero-order reaction?

As [A] decreases in a zero-order reaction, the rate:

If [A]0 = 0.80 M and k = 0.20 M s^-1, t1/2 = ?

Units of k for a zero-order reaction are:

Zero-order reactions often occur when:

Which equation derives from d[A]/dt = -k for zero-order?

Graph of rate vs [A] for zero-order is:

How does t1/2 in zero-order change with decreasing [A]0?

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