Question

Choose the most correct option.

The time required for 90% completion of a certain first-order reaction is t. The time required for 99.9% completion will be _________.

Options

• t

• 2t

• `"t"/2`

• 3t

Answer 1

The time required for 90% completion of a certain first-order reaction is t. The time required for 99.9% completion will be 3t.