Mcq 1 a substance is kept for 2 hours and three fourth disintegrates during this period. the half life opf substance is (a) 2 hour (b) 1 hour (c) 30 mn (d) 4 ho

MCQ 1 A substance is kept for 2 hours and three fourth disintegrates during this period. The half life opf substance is (a) 2 hour (b) 1 hour (c) 30 mn (d) 4 hour d fllauino radhoactive decay process, are