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Write balanced chemical equations for the following reactions: 

(a) Dilute sulphuric acid reacts with aluminium powder. 

(b) Dilute hydrochloric acid reacts with sodium carbonate. 

(c) Carbon dioxide is passed through lime water.

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(a)2Al(s) + 3H2SO4 (dil.) → Al2(SO4)3 (aq) +3H2(g)

(b)Na2CO3(s) + 2HCl (dil.)→ 2NaCl(aq) + H2O(l) + CO2(g)

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