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Questions  >>  CBSE XII  >>  Chemistry  >>  Chemical Kinetics
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Decomposition of phosphine (PH3) at 120C proceeds according to the equation: 4PH3(g)P4(g)+6H2(g) It is found that this reaction follows the following rate equation: Rate =k[PH3] The half-life of PH3 is 37.9s at 120C. (i) How much time will be required for 34 of PH3 to decompose? (ii) What fraction of the original amount of PH3 will remain undecomposed after 1 minute?

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