The new substances produced by oxidation - are normally a different colour., Oxidation is a chemical reaction - where a substance changes because oxygen is added., We can see oxidation occurring - in different foods and on metals., The atoms of these substances react with - oxygen in the air to make new substances.,

लीडरबोर्ड

दृश्य शैली

विकल्प

टेम्पलेट स्विच करें

ऑटो-सेव पुनःस्थापित करें: ?