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Existence of positively charged nucleus was established by:
(1) Positive ray analysis
(2) α -ray scattering experiments
() X-ray analysis
(4) Discharge tube experiments
Ans: α-ray scattering experiments
Comment on the validity of the following statements, giving reasons: (a) Thermodynamically an exothermic reaction is sometimes not spontaneous. (b) The entropy of steam is mo
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