Radioactivity is measure by

(a) Geiger-Muller counter
(b) Polarimeter
(c) Calorimeter
(d) Barometer

Anurag Mishra Professor Asked on 29th February 2016 in Chemistry.
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    Answer: (a) Geiger-Muller counter

    Anurag Mishra Professor Answered on 2nd March 2016.
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