एक काले रंग का सल्फाइड \( \mathrm{O}_{3} \) से क्रिया करके सफेद हो जाता है। सफेद पदार्थ है : (A)...

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एक काले रंग का सल्फाइड \( \mathrm{O}_{3} \) से क्रिया करके सफेद हो जाता है। सफेद पदार्थ है :
(A) \( \mathrm{ZnSO}_{4} \)
(B) \( \mathrm{BaSO}_{4} \)
(C) \( \mathrm{CaSO}_{4} \)
(D) \( \mathrm{PbSO}_{4} \)
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