What may happen when?
(i) Metal sodium is dropped on water
(i) An iron nail is dipped in the solution of copper sulphate?
(iii) Zinc is added to hydrochloric acid?
(iv) Sulphur dioxide gas is dissolved in water?
(v) Magnesium oxide is dissolved in water?
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Answer:
sodium react violently with water
iron displaces copper from its salt solution
Zn + HCl gives ZnCl2 + H2
MgO + H20 gives Mg(OH)2
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