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एक प्रथम कोटि की अभिक्रिया में 20% वियोजन होने में 40 मिनट लगते हैं। अर्धायु की गणना कीजिए।

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एक प्रथम कोटि की अभिक्रिया में 20% वियोजन होने में 40 मिनट लगते हैं। अर्धायु की गणना कीजिए।

(log10 = 1, log, 2 = 0.3010) 

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प्रथम कोटि के लिए,

प्रथम कोटि के लिए,

= 124.08 min 

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