This quiz contains multiple-choice problems on half-life methods.

The time required to convert to a fraction of 0.7 for a first-order reaction is

t{0.7} = 0.7/C{A{0}}.k

t{0.7} = -(0.7/C{A{0}}.k)

t{0.7} = 0.3/C{A{0}}.k

t{0.7} = -(0.3/C{A{0}}.k)

For a zero-order reaction, the slope of t{0.5} and C{A{0}} is

2

3

1

0

What is the slope of the plot of ln (t{0.5}) and ln (C{A{0}}), where n is the reaction order?

1-n

2-n

n

n/2

For all orders of reaction except the first order, half-life is related to initial concentration as

t{0.5} α C{A{0}}^n

t{0.5} α C{A{0}}^(1-n)

t{0.5} α C{A{0}}^2n

t{0.5} α C{A{0}}

True

False

If t{0.5} = 100 minutes and initial concentration is 10, the order of the reaction is

4

-1

-2

1

Autocatalytic reactions are single order reactions. True or false?

True

False

Autocatalytic reactions are the ones in which

One of the products poisons the catalyst

There is no catalyst employed

Only one reactant is involved

One of the products catalyses the reaction

The relationship between t{0.5} and C{A{0}} for a zero-order reaction is

t{0.5} = 1/k.C{A{0}}

t{0.5} = 1/C{A{0}}

t{0.5} = C{A{0}}/k

t{0.5} = C{A{0}}/2k

The fractional conversion is expressed as

C{A}/C{A{0}}

C{A{0}}/C{A}

1/C{A{0}}

C{A}/k.C{A{0}}