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प्रश्न
The time required for 90% completion of a certain first-order reaction is t. The time required for 99.9% completion will be _________.
विकल्प
t
2t
`"t"/2`
3t
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उत्तर
The time required for 90% completion of a certain first-order reaction is t. The time required for 99.9% completion will be 3t.
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