Question

What happens when a piece of

(a) Zinc is added to copper sulphate solution?

(b) Aluminium is added to dilute hydrochloric acid?

(c) Sodium piece is put in water?

(d) Magnesium ribbon is burnt in air?

• Write the equation for above statements.
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Answer 1

Answer:

(a) Zn + CuSO4 --> ZnSO4 +Cu

(b) Al + HCl --> AlCl3 + H

(c) Na + H2O --> NaOH +H

(d) Mg + O2 --> MgO

Answer 2

Answer:

Ans)

(a)When zinc in added to copper sulphate solution it displaces copper and forms zinc sulphate.

Zn+CuSO4 ------ ZnSO4+Cu

(b)When aluminum is added to dilute hydrochloric acid it displaces hydrogen and forms aluminum chloride.

2Al+6HCl ------ 2AlCl3+3H2

(c)When a piece of sodium is put in water it will displace hydrogen and will form sodium hydroxide

2Na+2H2O ------- 2NaOH+H2

(d)When a piece of magnesium ribbon is burnt in air it will combine with air to form magnesium dioxide

2Mg+O2 ------ 2MgO