Question

TRUE / FALSE
1. All ores are minerals but all minerals are not ores ?
2. iron can replace copper from it's aqueous solution?
3.metals react with oxygen to produce acidic oxides ?
4. non metals do not react with water?​

Answer 1

1. True
2. False
3. False
4. True

Explanation:

1. All ores are minerals while all minerals are not ores as some of them might have a large amount of unwanted substances such as sand, stones and earthly impurities.
2. Iron displaces copper ions from an aqueous solution of copper sulphate. ... Thus iron is more reactive than copper. In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).
3. For example, with careful control of oxygen, the oxide M2O (where M represents any alkali metal) can be formed with any of the alkali metals. When heated, lithium, sodium, potassium, rubidium, and cesium ignite through combustion reactions with oxygen.
4. Non-metals are electronegative are unable to break the bond between H and O in water. The non-metals cannot reduce hydrogen by donating electrons. Thus non metals do not react with water.