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Saturday, August 31, 2019
किस वैज्ञानिक ने ' परमाणु सिद्धांत ' की खोज की ?
(A) जॉन डाल्टन
(B) रदरफोर्ड
(C) मैडम क्यूरी
(D) इनमें से कोई नहीं
Ans- A
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