prove that,the time required for 99.9% completion of a first order reaction is almost ten times that required for half the reaction
996time required to complete 50% of reaction takes 1 half life time
similarly completion of another 25%of reaction takes another 1 half life time
12.5%->1 half life time
6.25%
3.125%
1.565%
.78125%
.390625%
.1953125%
.09%
therefore it is taking approx 10 half life times to complete 99.99%of reaction
1GUYS,A SINCERE ADVICE FROM THE CORE OF MY HEART,I BEING
A STUDENT OF CIV,FROM NIT ALLABAD,FIND THE PRESENT SCENARIO FOR ENGINEERS VERY GRIM,TOO MUCH COMPETITION,SAME HARD WORK IF YOU PUT IN MEDICAL ENTRANCE YOU WILL SURELY CRACK IT,NOT MUCH INTELLIGENCE IS REQUIRED.
YOU WILL LEAD A HAPPIER LIFE BASED ON YOUR OWN TERMS,YOU WILL HAVE NO BOSS,YOU WILL BE YOUR OWN BOSS,EARNING MORE THAN ANY IITIAN,NO RETIREMENT.UNLESS YOU ARE SURE TO CRACK IIT WITHIN TOP 3500,GO FOR IT .
OTHERWISE YOU WILL ONLY DESTROY YOURSELF.THINK WISELY .A LATE DECISION IS BETTER THAN A WRONG DECISION.