Cheistry Quiz प्रश्न :- इस्पात में कितना प्रतिशत कार्बन है ? (A) 3 % (B) 4 % (C) 2 % (D) 5 % Ans:- (C) 2 % प्रश्न :- कौन-सी धातु है जो अधिक ताप पर भी ऑक्सीजन से अभिक्रिया...
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