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प्रश्न
An element ‘A’ on exposure to moist air turns reddish-brown and a new compound ‘B’ is formed. The substance ‘A’ and ‘B’ are:
एका वाक्यात उत्तर
उत्तर
A = Fe (Iron)
B = Fe2O3 (Iron oxide)
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Effects of Chemical Changes: Environmental Effects
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